A couple of fish were arguing about the existence of a world outside the sea. The argument continued for several hours. They ended up concluding the world in the sea is all that exists because they had never seen a world outside the sea. In the same manner, some people say they will believe if we show them God. Others say they will know the existence of Heaven and Hell only after they die. But just as surely as there is another world outside of the sea, God is truly alive and Heaven and Hell surely exist.
"The fool has said in his heart, 'There is no God'…" (Psalm 14:1)