The fall & sin
In Adam all sinned; the heart is deceitful above all things.
Now the serpent was more crafty than any beast of the field that the LORD God had made. And he said to the woman, “Did God really say, ‘You must not eat from any tree in the garden?’” The woman answered the serpent, “We may eat the fruit of the trees of the garden, but about the fruit of the tree in the middle of the garden, God has said, ‘You must not eat of it or touch it, or you will die.’” “You will not surely die,” the serpent told her. “For God knows that in the day you eat of it, your eyes will be opened and you will be like God, knowing good and evil.” When the woman saw that the tree was good for food and pleasing to the eyes, and that it was desirable for obtaining wisdom, she took the fruit and ate it. She also gave some to her husband who was with her, and he ate it. …
Genesis 3:1–24
Therefore, just as sin entered the world through one man, and death through sin, so also death was passed on to all men, because all sinned. For sin was in the world before the law was given; but sin is not taken into account when there is no law. Nevertheless, death reigned from Adam until Moses, even over those who did not sin in the way that Adam transgressed. He is a pattern of the One to come. But the gift is not like the trespass. For if the many died by the trespass of the one man, how much more did God’s grace and the gift that came by the grace of the one man, Jesus Christ, abound to the many! Again, the gift is not like the result of the one man’s sin: The judgment that followed one sin brought condemnation, but the gift that followed many trespasses brought justification. For if, by the trespass of the one man, death reigned through that one man, how much more will those who receive an abundance of grace and of the gift of righteousness reign in life through the one man, Jesus Christ! …
Romans 5:12–21
What then? Are we any better? Not at all. For we have already made the charge that Jews and Greeks alike are all under sin. As it is written: “There is no one righteous, not even one. There is no one who understands, no one who seeks God. All have turned away, they have together become worthless; there is no one who does good, not even one.” “Their throats are open graves; their tongues practice deceit.” “The venom of vipers is on their lips.” “Their mouths are full of cursing and bitterness.” …
Romans 3:9–23
And you were dead in your trespasses and sins, in which you used to walk when you conformed to the ways of this world and of the ruler of the power of the air, the spirit who is now at work in the sons of disobedience. All of us also lived among them at one time, fulfilling the cravings of our flesh and indulging its desires and thoughts. Like the rest, we were by nature children of wrath.
Ephesians 2:1–3
Surely I was brought forth in iniquity; I was sinful when my mother conceived me.
Psalm 51:5
The heart is deceitful above all things and beyond cure. Who can understand it?
Jeremiah 17:9