The bible says, the imagination of man's heart is evil from his youth. (Gen. 8:21)  Man at birth is in God's sight unclean. (Job 14:1,4; 15:14; 25:4).  Man is conceived and shaped in sin. (Psa. 51:5)  Man is by nature sinful. (Eph. 2:1-3)  Man possesses an inward bent to evil "from the womb", or "as soon as he is born". (Psa. 58:3).  The power of sin is an element of moral evil; an indwelling, moving, working force.  Rom 7:9-13,17.  The New Testament teaches the Bible truth that sin is an act of rebellion against God (John 15:22; James 4:17; I John 3:4). There is no sin where there is no law of God (Rom 5:13), so one is not a sinner until he obtains knowledge of God's just demands on him and then willfully rebels. The act of sin causes one to forfeit his right to eternal life (Gen 2:17; Ezek 18:20,24; Rom 6:23), and renders him a slave to sin (John 8:34; Rom 6:16). It being true that humanity is sinful by birth and even from conception,  it follows conclusively that the elements that germinate depravity lay in the germ of human life, thus being transmitted down through the entire human family.  Therefore, this degenerate nature must have started in him through whom the human family fell (Rom. 5:12-19.  All men succumb to the powers of sin upon reaching the age of reason and moral responsibility (Rom 3:23; Rom 7:9; I John 1:8-10). All men, therefore, need a Savior (Acts 17:30- 31).