Everyone who has at least a little bit of intelligence, asks himself about God. Cows do not ask themselves about God, nor do they ask about the ultimate cause of things. But man, gifted with intelligence, stands in awe before the reality of creation, before the perfection of all things, and before the order of the universe. St. Paul says: “Ever since the creation of the world his invisible nature, namely his eternal power and deity, has been clearly perceived in the things that have been made. So they are without excuse; for although they knew God they did not honor him as God or give thanks to him, but they became futile in their thinking and their senseless minds were darkened.” (Rom 1:20-21).
Besides the reality and presence of created things, man also feels within a thirst for eternity, for immortality. He realizes he is a spiritual being, and not merely a highly evolved animal. He struggles with the mystery of death: “It is in the face of death that the riddle a human existence grows most acute. Not only is man tormented by pain and by the advancing deterioration of his body, but even more so by a dread of perpetual extinction. He rightly follows the intuition of his heart when he abhors and repudiates the utter ruin and total disappearance of his own person. He rebels against death because he bears in himself an eternal seed which cannot be reduced to sheer matter.” (GS, 18).
Another important reason for man to ask himself about God is the moral order. If a good God did not exist who would show us what is good and what is bad, man would become a prisoner of his own mistakes. When man tries to determine good and bad by his own authority, the law of the survival of the fittest is finally imposed, just like in the jungle. This leads to the deterioration of society and the self-destruction of man.
Finally, the Son of God became man. He came to earth, died, and resurrected. "I am the living bread which came down from heaven. If anyone eats of this bread, he will live forever; and the bread that I give for the life of the world is my flesh" (John 6:51). Anyone who talks like that can only be one of two things: a crazy person or the Son of God. If we remember that his disciples saw Him after the Resurrection, that His own enemies had to recognize the truth of His miracles, that the Church He founded has continued throughout the ages despite the miseries of Her members, the question about God does not seem so absurd nor can it be considered unnecessary. If what Christ said is true, then you can be in danger of losing eternal life. So anyone in their right mind will at least ask themselves what they should do to gain it.
Answer given by Fr. Félix López, S.H.M.