The moment sin entered into this world was when Adam and Eve believed the lie told by the serpent in Genesis 3:5, "For God knows that when you eat from it your eyes will be opened, and you will be like God, knowing good and evil." This is sin. Sin is an infectious worm that says "I am God" and "I decide what is right and what is wrong, what should and should not happen.". Sin is in essence, denying God his Godhood. It places the emphasis on what the creature wants, what the creature feels, and what the creature thinks is true. It doesn't give God all the glory he deserves, but is instead focused on gaining glory for itself. This is why the Pharisees are so ill-spoken of by Christ, because they, through their religion and understanding of God, saught to gain glory for themselves through works and false piety. God sent his son to be our sacrifice and our righteousness so that we could understand that he alone is God, and he alone can save us. Sin deeply desires to be its own hero: its own savior. But the glorious truth revealed in Christ is that salvation is by the Grace of God, the one and only supreme ruler. He alone saves, apart from anything inside of us. When I understood this I felt the sin that dwelled deep inside me. How everyday sin beckons me to be my own God, focusing solely on my own desires and thoughts. But thank God that he has given us of his spirit to understand that we are not God. It is only through his spirit we can truely see the sin that dwells so deep within us and every man.