The one and true God first reveals his glory to Israel.
revelation of the vocation and truth of man is linked to the revela
tion of God. Man’s vocation is to make God manifest by acting in
conformity with his creation “in the image and likeness of God”:
There will never be another God, Trypho, and there has been
no other since the world began . . . than he who made and
ordered the universe. We do not think that our God is
different from yours. He is the same who brought your
fathers out of Egypt “by his powerful hand and his out
stretched arm.”We do not place our hope in some other god,
for there is none, but in the same God as you do: the God of
Abraham, Isaac and Jacob.
“The first commandment embraces faith, hope, and char
ity. When we say ‘God’ we confess a constant, unchangeable being,
always the same, faithful and just, without any evil. It follows that
we must necessarily accept his words and have complete faith in
him and acknowledge his authority. He is almighty, merciful, and
infinitely beneficent. . . . Who could not place all hope in him? Who
could not love him when contemplating the treasures of goodness
and love he has poured out on us? Hence the formula God em
ploys in the Scripture at the beginning and end of his command
ments: ‘I am the Lord.’”
Our moral life has its source in faith in God who reveals
his love to us. St. Paul speaks of the “obedience of faith”
first obligation. He shows that “ignorance of God” is the principle
and explanation of all moral deviations.
Our duty toward God is
to believe in him and to bear witness to him.
The first commandment requires us to nourish and protect
our faith with prudence and vigilance, and to reject everything that
is opposed to it. There are various ways of sinning against faith:
about the faith disregards or refuses to
hold as true what God has revealed and the Church proposes for
refers to hesitation in believing, difficulty
7 St. Justin,
Dial. cum Tryphone Judaeo
11, 1: PG 6, 497.