2133 You shall love the LORD your God with all your heart, and with all your soul and with all your strength (Dt 6:5).
2134 The first commandment summons man to believe in God, to hope in him and to love him above all else.
2135 You shall worship the Lord your God (Mt 4:10). Adoring God, praying to him, offering him the worship that belongs to him,fulfilling the promises and vows made to him, are acts of the virtue of religion which fall under obedience to the first commandment.
2136 The duty to offer God authentic worship concerns man both as an individual and as a social being.
2137 Men of the present day want to profess their religion freely in private and in public (DH 15).
2138 Superstition is a departure from the worship that we give to the true God. It is man j[ested in idolatry, as well as in various forms of divination and magic.
2139 Tempting God in words or deeds, sacrilege and simony are sins of irreligion forbidden by the first commandment.
2140 Since it rejects or denies the existence of God, atheism is a sin against the first commandment.
2141 The veneration of sacred images is based on the mystery of the Incarnation of the Word of God. It is not contrary to the first commandment.
You shall not take the name of the LORD your God in vain.72 You have heard that it was said to the men of old, You shall not swear falsely... But I say to you, Do not swear at all.73
2142 The second commandment prescribes respect for the Lords name. Like the first commandment, it belongs to the virtue of religion and more particularly it governs our use of speech in sacred matters.