This excerpt is from this blog back in January 2008. Phil discusses the doctrine of Original Sin.
It seems the doctrines that pertain to human sin are generally some of the hardest doctrines for people to understand and embraceparticularly the doctrines of original sin and universal depravity. Of all the doctrines taught in Scripture about the nature of humanity, the one doctrine that comes under attack more than any other is the Bible's teaching that all have sinned and fall short of the glory of God, that we inherited a sinful nature from Adam, and that it means we are completely helpless to redeem ourselves from the condemnation of God.
To paraphrase Mrs. Fletcher, we're fallen, and we can't get up.
Those ideas run counter to every other religion man has ever devised. People want to believe they are basically good, that they can be good enough to please God, and that if they just set their hearts and minds to do good, they can redeem themselves from their own sin.
People don't want to believe that Adam's sin put the whole human race in a spiritually hopeless state. They don't want to admit that they are sinful to the very core of their beings. They don't want to admit that their most basic desires, and even the private imaginations of their hearts are utterly and hopelessly sinful, and they are powerless to change themselves. By any standard, these are hard truths.
And yet every bit of evidence we examine confirms all these things. Scripture clearly teaches that there is none that doeth good. There is none that seeketh after God. No, not one. Human experience confirms this. G. K. Chesterton once wrote that the doctrine of original sin is the easiest of all the doctrines of Scripture to prove. Evidence of human depravity is all around us. No one in all our acquaintance is sin-free. Proof that the whole human race is fallen is everywhere, in the daily newspapers, on the evening news, and clearly evident in every life we encounter.
Most of all, if we're honest with ourselves, the most persuasive proof that the human race is hopelessly depraved is inside our own hearts.