The ignorance of human nature is opitimized by those who say that they will believe in God if He will appear to them. But if God appeared to them, they would instantly die. His holiness would consume them faster than the surface of the sun would melt already soft butter. God doesn't require that we "believe" in Him. The Bible says that demons believe and tremble. Besides, all men already know that God exists. He has given light to every man(John 1:9); it's just that there are some that the Scriptures call "fools" who deny their inbuilt knowledge of God's existence.(Psalm 14:1) Salvation comes from more than a mere belief. It comes when we obey God by turning from sin and trusting in the Savior. It's then that sinners are forgiven and granted the gift of everlasting life. There goes another minute. Gone forever. Go share your faith while you still have time.