III. The Knowledge of God According to the Church

From The Catechism of the Catholic Church

Though human reason is,
strictly speaking, truly capable by its own natural power and light of
attaining to a true and certain knowledge of the one personal God, who watches
over and controls the world by his providence, and of the natural law written
in our hearts by the Creator; yet there are many obstacles which prevent reason
from the effective and fruitful use of this inborn faculty. For the truths that
concern the relations between God and man wholly transcend the visible order of
things, and, if they are translated into human action and influence it, they
call for self-surrender and abnegation. the human mind, in its turn, is
hampered in the attaining of such truths, not only by the impact of the senses
and the imagination, but also by disordered appetites which are the
consequences of original sin. So it happens that men in such matters easily
persuade themselves that what they would not like to be true is false or at
least doubtful.¹³