Man is by nature and vocation a religious being. Com-
ing from God, going toward God, man lives a fully
human life only if he freely lives by his bond with God.
Man is made to live in communion with God in whom
he finds happiness: “When I am completely united to
you, there will be no more sorrow or trials; entirely full
of you, my life will be complete” (St. Augustine,
10, 28, 39: PL 32, 795).
When he listens to the message of creation and to the
voice of conscience, man can arrive at certainty about
the existence of God, the cause and the end of every
The Church teaches that the one true God, our Creator
and Lord, can be known with certainty from his
works, by the natural light of human reason (cf. Vati-
can Council I, can. 2, § 1: DS 3026).
We really can name God, starting from the manifold
perfections of his creatures, which are likenesses of the
infinitely perfect God, even if our limited language
cannot exhaust the mystery.
“Without the Creator, the creature vanishes” (
This is the reason why believers know that the love of
Christ urges them to bring the light of the living God
to those who do not know him or who reject him.