"O Lord, our Lord, how majestic is your name in all the earth" (Ps 8:1)!
The second commandment enjoins respect for the Lord's name. the name of the Lord is holy.
The second commandment forbids every improper use of God's name. Blasphemy is the use of the name of God, of Jesus Christ, of the Virgin Mary, and of the saints in an offensive way.
False oaths call on God to be witness to a lie. Perjury is a grave offence against the Lord who is always faithful to his promises.
"Do not swear whether by the Creator, or any creature, except truthfully, of necessity, and with reverence" (St. Ignatius of Loyola, Spiritual Exercises, 38).
In Baptism, the Christian receives his name in the Church. Parents, godparents, and the pastor are to see that he be given a Christian name. the patron saint provides a model of charity and the assurance of his prayer.
The Christian begins his prayers and activities with the Sign of the Cross: "in the name of the Father and of the Son and of the Holy Spirit. Amen."
God calls each one by name (cf Isa 43:1). Remember the sabbath day, to keep it holy. Six days you shall labor, and do all your work; but the seventh day is a sabbath to the Lord your God; in it you shall not do any work.90 The sabbath was made for man, not man for the sabbath; so the Son of Man is lord even of the sabbath.91