Eight Hebrew words for sin are found in Bible. Paul in Romans sees sin as condition that plagues the human race, Rom. We know these verses, all have sinned. Sin as a condition also works its way out through our bodily members, Rom. That is, the activities of the body are the outlet for sin.
Sin is defined first in actions.
And there is no slavery that can compare to the slavery of ingrained habits, Rom. No one who has been born of God will continue to sin, because God's seed remains in him, he cannot go on sinning because he has been born of God. We often stop right there, somewhat comforting as we see sin in our lives, for our relationship to God does not depend upon perfection. This is also key to our understanding. Genesis 1 describes humans as dual beings.