It's a whole religion based around the idea that God Himself would literally die for you - even if you don't like him. That he loves you that much, regardless of anything you ever did, or what you think of him. God IS love.
- With the immediate corrolary to the above that the number one thing a Christian should have is love, for God and for others.
"A new commandment I give unto you, that you love one another"
"Love the Lord your God with all your heart, and your soul, all your mind, and all your strength. This is the first and greatest commandment. And the second is like unto it: Love your neighbour as yourself. ON these two hang all the law and the prophets."
"If I speak in the tongues of men and of angels, but have not love, I am like a loud gong, or a clanging cymbal. And if I have the gift of prophecy, and can understand all mysteries and all knowledge, and have faith to move mountains, but have not love, I am nothing. If I give all I have to the poor and surrender my body to the flames, that I may boast, but have not love, then what is gained?"
- Second chances. You can screw up, but as long as you're genuinely sorry and honestly seeking to do better this time around, God does not give up on you. Repent, and you will be forgiven. Once again, this is a quility that Christians are supposed to try to emulate. When peter asks if it would be reasonable to forgive up to seven times, Jesus tells him to try for four hundred and ninety.