Perhaps the clearest testimony to the depravity of man is the amount of light that he can meet with that does him absolutely NO GOOD. It doesn't matter how much spiritual light that an unregenerate person meets with, if left to himself, he is not benefited by that light, rather his guilt is increased because he has no appetite for it. The truth doesn't save him in his natural state; the truth only condemns him. Man's spiritual blindness is more than just spiritual ignorance; it is WILLFUL spiritual ignorance.