Number six is often associated humanity. The core description of man is usually in or because of his original state of sin. God created man on the sixth day of creation Genesis 1:26-31.  

There were six recorded generations of CAIN Genesis 4:17-18 Cain lay with his wife, and she became pregnant and gave birth to Enoch. Cain was then building a city, and he named it after his son Enoch. To Enoch was born Irad, and Irad was the father of Mehujael, and Mehujael was the father of Methushael, and Methushael was the father of Lamech. (NIV)

The Israelites were told to gather manna from the ground for six days and not on the seventh day. Exodus 16:26-27 If a Hebrew bought another Hebrew he was only allowed to enslave themn for six years. Exodus 21:2 "If you buy a Hebrew servant, he is to serve you for six years. But in the seventh year, he shall go free, without paying anything. (NIV)

The tribal leaders of Israel brought their offering for the building of the tabernacle on six carts. Numbers 7:2-3 Then the leaders of Israel, the heads of families who were the tribal leaders in charge of those who were counted, made offerings. They brought as their gifts before the LORD six covered carts and twelve oxen-- an ox from each leader and a cart from every two. These they presented before the tabernacle.(NIV)

There were six cities of refuge which were shelters of safety. Numbers 35:15 'These six cities shall be for refuge for the sons of Israel, and for the alien and for the sojourner among them; that anyone who kills a person unintentionally may flee there.

There were six days of labor instituted for the Israelites. Deuteronomy 5:12-13 "Observe the Sabbath day by keeping it holy, as the LORD your God has commanded you. Six days you shall labor and do all your work, (NIV)

After six steps of the priests carrying the Ark of the Covenant back to Jerusalem, a sacrifice was required. 2 Samuel 6:13 When those who were carrying the ark of the LORD had taken six steps, he sacrificed a bull and a fattened calf.(NIV)

The wicked Philistine man with six fingers and six toes. 2 Samuel 21:20 In still another battle, which took place at Gath, there was a huge man with six fingers on each hand and six toes on each foot-- twenty-four in all. He also was descended from Rapha.(NIV)

There are six characteristics described of a man the Lord hates. Proverbs 6:16-19 There are six things the LORD hates, seven that are detestable to him: haughty eyes, a lying tongue, hands that shed innocent blood, a heart that devises wicked schemes, feet that are quick to rush into evil, a false witness who pours out lies and a man who stirs up dissension among brothers.(NIV)

The transformation of water into wine by Jesus was done in six stone jars. John 2:6-9 Nearby stood six stone water jars, the kind used by the Jews for ceremonial washing, each holding from twenty to thirty gallons. Jesus said to the servants, "Fill the jars with water"; so they filled them to the brim. Then he told them, "Now draw some out and take it to the master of the banquet." They did so, and the master of the banquet tasted the water that had been turned into wine. He did not realize where it had come from, though the servants who had drawn the water knew. Then he called the bridegroom aside (NIV)

The Number seven is often called the number of perfection. It is used approximately six hundred times in the Bible. The number seven shows us the perfect completion of mankind (6+1=7) and man’s need for one perfect example and fulfillment in Jesus Christ.

It also display a perfecting balance in life and the ultimate “tie-breaking” vote for truth and ultimate righteousness (3+1+3=7). Genesis chapters 1 & 2 show the process of creation completed in seven days.

We see the number seven used in ceremonial healing. Leviticus 14:7 Seven times he shall sprinkle the one to be cleansed of the infectious disease and pronounce him clean. Then he is to release the live bird in the open fields.(NIV)

Jericho was marched on seven times by the children of Israel. Joshua 6:4 Have seven priests carry trumpets of rams' horns in front of the ark. On the seventh day, march around the city seven times, with the priests blowing the trumpets.(NIV)

In Jude 1:14-15 we see the seven generations of Adam to Enoch as very  significant.  “Enoch, the seventh from Adam, prophesied about these men: "See, the Lord is coming with thousands upon thousands of his holy ones to judge everyone, and to convict all the ungodly of all the ungodly acts they have done in the ungodly way, and of all the harsh words ungodly sinners have spoken against him." (NIV).

The book of Revelation is riddled with the number seven. For the most part all references focus in on the presence and perfected (glorified) image of Jesus Christ. Here are some of the most descriptive texts; Revelation 1:4-16 John, To the seven churches in the province of Asia: Grace and peace to you from him who is, and who was, and who is to come, and from the seven spirits before his throne, and from Jesus Christ, who is the faithful witness, the firstborn from the dead, and the ruler of the kings of the earth. To him who loves us and has freed us from our sins by his blood, and has made us to be a kingdom and priests to serve his God and Father-- to him be glory and power for ever and ever! Amen. Look, he is coming with the clouds, and every eye will see him, even those who pierced him; and all the peoples of the earth will mourn because of him. So shall it be! Amen. "I am the Alpha and the Omega," says the Lord God, "who is, and who was, and who is to come, the Almighty." I, John, your brother and companion in the suffering and kingdom and patient endurance that are ours in Jesus, was on the island of Patmos because of the word of God and the testimony of Jesus. On the Lord's Day I was in the Spirit, and I heard behind me a loud voice like a trumpet, which said: "Write on a scroll what you see and send it to the seven churches: to Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia and Laodicea." I turned around to see the voice that was speaking to me. And when I turned I saw seven golden lampstands, and among the lampstands was someone "like a son of man," dressed in a robe reaching down to his feet and with a golden sash around his chest. His head and hair were white like wool, as white as snow, and his eyes were like blazing fire. His feet were like bronze glowing in a furnace, and his voice was like the sound of rushing waters. In his right hand he held seven stars, and out of his mouth came a sharp double-edged sword. His face was like the sun shining in all its brilliance.(NIV)

The number seven is used fifty five times in the book of Revelation (nearly one tenth of its total use in the entire Bible). This testifies to the nature and quality of the inspiration of the text. It weaves the perfect nature of God and his divine purpose for man through the entire book. The continued and numerous use of the number seven throughout the entire scriptural text shows the hand of God working to perfect the elect in the process of salvation and sanctification. 

The number eight is the number of new beginnings or resurrection. The calves used in the sacrificial offerings in the Tabernacle of Moses in the wilderness were to be rendered on the eight day of life Exodus 22:29-30 ".(NIV)

Old Testament Levitical law dictated that a healed leper (or diseased person) was to be pronounced clean from the  disease on the eighth day of a ritualistic cleansing process. Leviticus 14:10-11"On the eighth day he must bring two male lambs and one ewe lamb a year old, each without defect, along with three-tenths of an ephah of fine flour mixed with oil for a grain offering, and one log of oil. The priest who pronounces him clean shall present both the one to be cleansed and his offerings before the LORD at the entrance to the Tent of Meeting. (NIV)

David was the eighth son of Jesse, and thus became the new King of Israel starting a new royal lineage. 1 Samuel 16:10-12 Jesse had seven of his sons pass before Samuel, but Samuel said to him, "The LORD has not chosen these." So he asked Jesse, "Are these all the sons you have?" "There is still the youngest," Jesse answered, "but he is tending the sheep." Samuel said, "Send for him; we will not sit down until he arrives." So he sent and had him brought in. He was ruddy, with a fine appearance and handsome features. Then the LORD said, "Rise and anoint him; he is the one."(NIV)

When we break down its components, we start to see definition as it applies to its scriptural use. Examples: The eighth day of the week is the first day of the next new week (7+1=8).

Jesus Christ was raised from the mortal dead on the first day of the new week. Matthew 28:1-6 After the Sabbath, at dawn on the first day of the week, Mary Magdalene and the other Mary went to look at the tomb. There was a violent earthquake, for an angel of the Lord came down from heaven and, going to the tomb, rolled back the stone and sat on it. His appearance was like lightning, and his clothes were white as snow. The guards were so afraid of him that they shook and became like dead men. The angel said to the women, "Do not be afraid, for I know that you are looking for Jesus, who was crucified. He is not here; he has risen, just as he said. Come and see the place where he lay.(NIV)

As we previously saw, the number four is the number of the earth. The apostle Peter in his second epistle makes reference to a new earth that will come to pass. 2 Peter 3:11-13 Since everything will be destroyed in this way, what kind of people ought you to be? You ought to live holy and godly lives as you look forward to the day of God and speed its coming. That day will bring about the destruction of the heavens by fire, and the elements will melt in the heat. But in keeping with his promise we are looking forward to a new heaven and a new earth, the home of righteousness. (NIV) Forming a Biblical equation of the old earth and the new earth we see the number eight again representing new beginnings (4+4=8).