When we talk about proof of the existence of God, we must underline that it is not proof of a scientific-experimental nature. Scientific evidence, in the modern sense of the word, is valid only for things perceptible to the senses, since only on these can the instruments of investigation and verification, which science uses, be exercised. Wanting scientific proof of God would mean lowering God to the rank of beings in our world, and therefore already being methodologically wrong about what God is. Science must recognize its limits and its impotence to reach the existence of God: it can neither affirm nor deny this existence. However, the conclusion must not be drawn from this that scientists are incapable of finding, in their scientific studies, valid reasons to admit the existence of God. If science, as such, cannot reach God, the scientist, who possesses intelligence whose object is not limited to sensible things, can discover in the world the reasons for affirming a being that surpasses it. Many scientists have made and are making this discovery.