In Short
Romans 6:23 For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
John 3:16 "For God so loved the world, that He gave His only begotten Son, that whoever believes in Him should not perish, but have eternal life."
A Bit More
Rom 1:18-20, 28-32 (the problem)
Rom 3:21-26 (the solution)
A Longer Version
All men have sinned (rebelled against God) and so we are separated from Him:
Genesis 2:16-17 And the Lord God commanded the man, saying, "From any tree of the garden you may eat freely; but from the tree of the knowledge of good and evil you shall not eat, for in the day that you eat from it you shall surely die."
Gen 3:6 When the woman saw that the tree was good for food, and that it was a delight to the eyes, and that the tree was desirable to make one wise, she took from its fruit and ate; and she gave also to her husband with her, and he ate.
Gen 3:22 then the Lord God said, "Behold, the man has become like one of Us, knowing good an evil; and now, lest he stretch out his hand, and take also from the tree of life, and eat, and live forever" -- therefor the Lord God sent him out from the garden of Eden, to cultivate the ground from which he was taken.
Exodus 19:5-8 'Now then, if you will indeed obey My voice and keep My convenant, then you shall be My own possession among all the peoples, for all the earth is Mine; and you shall be to Me a kingdom of priests and a holy nation.' ... So Moses came and called the leaders of the people, and set them before them all these words which the Lord had commanded him. And all the people answered together and said, "All that the Lord has spoken we will do!"
Deut 28:1-2, 9-11 "Now it shall be, if you will diligently obey the Lord your God, being careful to do all His commandments which I command you today, the Lord your God will set you high above all the nations of the earth. And all these blessing shall come upon you and overtake you, if you will obey the Lord your God. ... The Lord will establish you as a holy people to Himself, as He swore to you, if you will keep the commandments of the Lord your God, and walk in His ways. So all the peoples of the earth shall see that you are called by the name of the Lord; and they shall be afraid of you. And the Lord will make you abound in prosperity, in the offspring of your BODYand in the offspring of your beast and in the produce of your ground, in the land which the Lord swore to your fathers to give you.
Deut 30:19-20 "I call heaven and earth to witness against you today, that I have set before you life and death, the blessing and the curse. So choose life in order that you may live, you and your descendants, by loving the Lord your God, by obeying His voice, and by holding fast to Him; for this is your life and the length of your days, that you may live in the land which the Lord swore to your fathers, to Abraham, Isaac, and Jacob, to give them."
Mark 12:29-31 Jesus answered, "The foremost is, 'Hear, O Israel! The lord our God is one Lord; and you shall love the Lord your God with all your heart, and with all your soul, and with all your mind, and will all your strength.' The second is this, 'You shall love your neighbor as yourself.' There is not other commandment greater than these."
Romans 3:23 ... for all have sinned and fall short of the glory of God, ...
Jesus claimed divinity :
John 10:30 "I and the Father are one."
John 14:6 Jesus said to him, "I am the way, and the truth, and the life; no one comes to the Father, but through Me."
Jesus claimed that forgiveness of sins and eternal life are gained by belief in him.
John 6:47-48 "Truly, truly, I say to you, he who believes has eternal life. I am the bread of life."
John 17:3 "And this is eternal life, that they may know Thee, the only true God, and Jesus Christ whom Thou hast sent."
John 3:16 "For God so loved the world, that He gave His only begotten Son, that whoever believes in Him should not perish, but have eternal life."
This belief is more than a mere intellectual acceptance of Jesus' existance, admitting that you've rebelled against God, and repenting of that.
Luke 5:31 And Jesus answered and said to them, "It is not those who are well who need a physician, but those who are sick. I have not come to call the righteous but sinners to repentance."
Other Useful Verses
1 Corinthians 15:12-19 w/o resurrection our faith is worthless
Romans 5:9 saved from wrath of God
2 Cor 5:21 Jesus became sin on our behalf
Luke 3:21-22 voice from heaven says, "This is my son..."
John 20:24-28 resurrection
Matt 28:5-8 resurrection
1 Peter 2:22-24 Christ was w/o sin
1 John 7:21-23 Christ was w/o sin
Matt 7:21-23 mus tdo works of the Father
Matt 7:7-11 seek and you shall find
Matt 25:31-46 heaven and hell
What is treason?
What is the punishment for treason?
What, then, might you expect would be the required punishment for rebellion against God?
Rom 1:18-20, 28-32
According to Paul, is man basically ignorant or knowledgable about God?
Does man then have any excuse for disregarding God?
What then is the state of man with respect to God if he disregards God?
What does this state lead to?
Rom 3:21-26
What's the basic problem?
What has God given us?
How is it received?
What is required for justice to be served when someone breaks the law?
How is God's justice served by the death of Christ?
How does this satisfaction of justice also provide mercy for us?