This is blatantly unbiblical. Those involved in the Pelagian controversies of the early church centuries debated this over and over, and came to the conclusion that man is a sinner by nature, and that his sinful actions stem from what he is. Further, sin permeated all of man's being. The prophet Jeremiah summed it up this way: "The heart is more deceitful than all else and is desperately sick" (Jer. 17:9)! Paul clearly teaches that, through Adam's one transgression, this innate sinfulness (sin nature) was passed to all of his descendants (Rom. 5:18; 1 Cor. 15:22). Strobel seems to be much closer to the Roman Catholic teaching that the cross.