Born Again - Could it be different than what we think?

From a conversation I had with a friend of mine, I discuss the possibility of a connection between some verses I read in the Bible. The concept of being born again seems to connect with returning to God and his commandments. I'm trying to piece some verses together. They all seem to be referring to Life / Eternal Life and blessing for keeping God's Law which will ultimately result in us being allowed to enter the Kingdom of God, His Holy City on the New Earth; and we will be allowed to eat of the fruit of the Tree of Life. They all seem to connect, but see what you think. Here are some of the passages:
John 3:3 Jesus answered and said to him, "Most assuredly, I say to you, unless one is born again, he cannot see the kingdom of God."
4 Nicodemus said to Him, "How can a man be born when he is old? Can he enter a second time into his mother's womb and be born?"
5 Jesus answered, "Most assuredly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God.
6 "That which is born of the flesh is flesh, and that which is born of the Spirit is spirit.
7 "Do not marvel that I said to you, 'You must be born again.'
Revelation 22:14 Blessed are those who do His commandments, that they may have the right to the tree of life, and may enter through the gates into the city.
15 But outside are dogs and sorcerers and sexually immoral and murderers and idolaters, and whoever loves and practices a lie.
Matthew 19:16 Now behold, one came and said to Him, "Good Teacher, what good thing shall I do that I may have eternal life?"
17 So He said to him, "Why do you call Me good? No one is good but One, that is, God. But if you want to enter into life, keep the commandments."
Deuteronomy 30:15 "See, I have set before you today life and good, death and evil,
16 "in that I command you today to love the LORD your God, to walk in His ways, and to keep His commandments, His statutes, and His judgments, that you may live and multiply; and the LORD your God will bless you in the land which you go to possess.
17 "But if your heart turns away so that you do not hear, and are drawn away, and worship other gods and serve them,
18 "I announce to you today that you shall surely perish; you shall not prolong your days in the land which you cross over the Jordan to go in and possess.
19 "I call heaven and earth as witnesses today against you, that I have set before you life and death, blessing and cursing; therefore choose life, that both you and your descendants may live;
20 "that you may love the LORD your God, that you may obey His voice, and that you may cling to Him, for He is your life and the length of your days; and that you may dwell in the land which the LORD swore to your fathers, to Abraham, Isaac, and Jacob, to give them."