The human being has an intellect, will, heart which has a natural desire for God since he is immortal (will always exist).
“But no darkness of error or of sin can totally take away from man the light of God the Creator. In the depths of his heart there always remains a yearning for absolute truth and a thirst to attain full knowledge of it. This is eloquently proved by man's tireless search for knowledge in all fields. It is proved even more by his search for the meaning of life. The development of science and technology, this splendid testimony of the human capacity for understanding and for perseverance, does not free humanity from the obligation to ask the ultimate religious questions. Rather, it spurs us on to face the most painful and decisive of struggles, those of the heart and of the moral conscience.” (Veritatis Splendor #1)