The Bible tells us not to lash out in anger and call a man a fool (Matthew 5:22) but a fool is easy to identify.
For instance, “The fool hath said in his heart, There is no God” (Psalm 53:1). Atheists, therefore, are fools; and all the “science falsely so called” (1 Timothy 6:10) they can conjure up in their semi-scholastic incantations does not change the fact that God exists (Exodus 3:14) and “created the heavens and the earth” (Genesis 1:1) and everything that exists in six 24-hour days (Exodus 20:11). It is the only reasonable conclusion right-thinking people can make concerning the origin of all things.
“The fool walketh in darkness” (Ecclesiastes 2:14). Ignorance is not bliss and what one does not know can hurt, sometimes permanently (2 Thessalonians 1:8). Pleading ignorance, especially as an excuse for evil (Malachi 1:6, 7; 2:17; 3:8), is the sure sign of a fool and does nothing to mitigate the consequences.
Finally, “The way of a fool is right in his own eyes” (Proverbs 12:15). People can attempt to justify themselves until they are blue in the face, nevertheless, no one but God is qualified to justify or condemn. It has always been a sad but true irony that those who are the quickest to condemn judging will be the first to judge themselves righteous (2 Corinthians 10:12). God is truth (John 14:6) and He must be guide and standard for all who wish to be justified (1 Corinthians 4:4).
Of course this article is obviously not going to be appreciated by a fool, so perhaps we should “Speak not in the ears of a fool: he will despise the wisdom of thy words” (Proverbs 23:9). Instead, we will encourage only those who are not fools to read this article since “he that hearkeneth unto counsel is wise” (Proverbs 12:15).
 All passages from the King James Version of the Bible