Psalms 14:1 The fool says in his heart, “There is no God.” They are corrupt, they do abominable deeds; there is none who does good. Maybe some of us recognize that the Word of God speaks about fools and foolish actions. However, biblically Speaking What is a Fool? 

In the original language the word we translate as "fool" comes from the masculine Hebrew noun נָבָל (nā·ḇāl): n.masc.; ≡ fool, i.e., man or person who lacks understanding or even the capacity for understanding; implying he/she is a rebel, having a willful moral insolence and impudence and disobedience to the law of God (1Sa 25:25; Job 30:8; Ps 14:1; 39:9; 53:2, Pr 17:7, Isa 32:5, Jer. 17:11).

In our culture we hear the word fool and think it means someone who is stupid intellectually. However, the fool in Psalms 14 is a moral and spiritual fool. This fool is the person that sees the clear evidence of a creator from creation around them (Romans 1) but says he does not exist. Though the fool says in his heart there is no God, and though mankind refuses to seek after his creator; The Lord has given believers his righteousness and he restores and refreshes us during our trials! Don't be a fool; recognize the obvious that there is a God; then repent and surrender your life to God!