If we say that we have no sin, we deceive ourselves, and the truth is not in us. If we say that we have not sinned we make him a liar, and his word is not in us. I John 1:8,10.
2) Because the carnal mind is enmity against God: for it is not subject to the law of God, neither indeed can be. Rom. 8:7.
Among whom also we all had our conversation in times past in the lusts of our flesh, fulfilling the desires of the flesh and of the mind; and were by nature the children of wrath, even as others. Eph. 2:3.1) As it is written, there is none righteous, no, not one there is none that understandeth, there is none that seeketh after God. They are all gone out of the way, they are together become unprofitable; there is none that doeth good, no, not one. For all have sinned, and come short of the glory of God. Rom. 3:10-12,23.