We are born into sin.
Psalms 51:5
Behold, I was brought forth in iniquity,
And in sin my mother conceived me.
Romans 3:23
...for all have sinned and fall short of the glory of God,...
It is our innate nature that makes us enemies of God and children of wrath.
Ephesians 2:3
...among whom also we all once conducted ourselves in the lusts of our flesh, fulfilling the desires of the flesh and of the mind, and were by nature children of wrath, just as the others.
Romans 5:12
Therefore, just as through one man sin entered the world, and death through sin, and thus death spread to all men, because all sinned—
There is nothing good within us. We are innately evil at heart. Selfish to the core.
Genesis 6:5
Then the Lord saw that the wickedness of man was great in the earth, and that every intent of the thoughts of his heart was only evil continually.
Genesis 8:21
And the Lord smelled a soothing aroma. Then the Lord said in His heart, “I will never again curse the ground for man’s sake, although the imagination of man’s heart is evil from his youth; nor will I again destroy every living thing as I have done.
Jeremiah 17:9
“The heart is deceitful above all things,
And desperately wicked;
Who can know it?"
Think about this... Look at a child. Have they learned to bite, to fight, to take, to be selfish, to be greedy? No. They just are that way. It would take a very disillusioned person to look at a child and call them innately good. As parents we have to constantly bring them under correction to encourage sharing, not biting, not hitting, etc. They do not learn to be evil, but they must learn to be good.
We are ALL sinners. There is NOT ONE that is good. We ALL stand under conviction of the law in our depravity. Know the truth. Study the Word for yourself my friend. More hinges on your knowledge of the truth than you may realize.
1 Timothy 4:15-16
Meditate on these things; give yourself entirely to them, that your progress may be evident to all. Take heed to yourself and to the doctrine. Continue in them, for in doing this you will save both yourself and those who hear you.