What made the humanity to become so self-centered? When God created Adam and Eve, they weren't self-centered. They were God-centered. They walked naked in the garden. They didn't care the fact that they were naked. The man and his wife were both naked, and they felt no shame (Genesis 2:25). Look at the animals. All of them are naked.
[This is one thing the evolutionists can't answer. When did humanity start wearing cloths to hide their genitals? What was the origin of the thing called shame? Monkeys don't wear cloths. All of a sudden when the monkey became a human, he started going for shopping at Macy's?]
Adam and Eve bore the glorious image of God when they were created. God created man in his own image. He breathed into his nostrils the breath of life. They were blinded (in a good way) by the glorious harmony they had with God. They not only felt free, but they were truly free. God gave them total freedom, including the freedom to choose evil. (If freedom didn't include freedom to sin, it isn't real freedom.)
They chose to eat from the wrong tree, lost their god-centeredness and gained self-centeredness. They weren't created to posess a knowledge of good and evil, yet they chose to have it. Bible says, "then the eyes of both of them were opened". Ha! All of a sudden, they are looking at themselves. Now they are seeing everything through that newly opened set of eyes. It says, they sewed fig leaves together and made coverings for themselves and then they hid.
When God came looking for them, He found them hiding out of shame and asks this question, "Who told you that you were naked?". Which implies that the only third person there, which is God himself, not seeing them as naked. They became sin-conscious. Their god-consciousness died.
The good news is, the Second Adam (Christ) restored it for you an me. He cleansed our conscience (Heb 9:14). He don't expect you to feel shame today. He don't want you to hide from Him. He don't want you to sew your own filthy rags (obedience to the law, self effort, good works etc) today.
If you are in Christ and still going to God begging for forgiveness, thinking that you are rejected by Him when you sin, he is going to ask you this question: "Who told you that you were naked?". It is the law what tells you that you are naked (not worthy, sinful etc). It is the knowledge of good and evil (law) that makes you self-centered. Law only condemns! Law has no place in a Christian's life. (Gal 3:23-25) So, dump the knowledge of good and evil (which you were never meant to have) and eat from the Tree of Life. There is freedom, because there is no condemnation!