"The fool hath said in his heart, There is no God. They are corrupt, they have done abominable works, there is none that doeth good" (Psalm 14:1).
Despite all their pretense of scientific intellectualism, those who deny the existence of a personal Creator God are, in God's judgment, nothing but fools. The 14th Psalm, the 53rd Psalm, Romans 3, etc., all describe the inner character of all such people--whether they call themselves atheists or humanists or pantheists or whatever. This repeated emphasis indicates how strongly God feels about those who dare to question His reality. It is bad enough to disobey His commandments and to spurn His love; it is utter folly to deny that He even exists!
The Bible describes the awful descent from true creationism into evolutionary pantheistic humanism. "When they knew God, they glorified Him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened. Professing themselves to be wise, they became fools. . . . Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator" (Romans 1:21-22,25).
Certain atheists/humanists claim to be moral people, though their criteria of morality are often quite different from those of the Bible. No matter how admirable their humane acts of "righteousness" may seem, however, they are guilty of the sin of unbelief, the greatest sin of all. "Without faith it is impossible to please Him: for he that cometh to God must believe that He is" (Hebrews 11:6). With all the innumerable evidences of God's reality as seen in the creation and throughout history, and then especially in the Person and work of Jesus Christ, it is utter foolishness to plunge blindly into eternity to meet the God whom they deny. HMM