CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 222–225

222 Believing in God, the only One, and loving him with all our being has enormous consequences for our whole life.
223 It means coming to know God's greatness and majesty: "Behold, God is great, and we know him not." Therefore, we must "serve God first".
224 It means living in thanksgiving: if God is the only One, everything we are and have comes from him: "What have you that you did not receive?" "What shall I render to the LORD for all his bounty to me?"
225 It means knowing the unity and true dignity of all men: everyone is made in the image and likeness of God.