It's one of the 10 commandments, Exodus 20:7 KJVS Thou shalt not take the name of the LORD thy God in vain; for the LORD will not hold him guiltless that taketh his name in vain."

Many believe this means we shouldn't use Gods name when we cuss or swear. That's probably a good habit to keep from but consider this... Once one is converted to Christianity, we take His name upon ourselves [Christ-ian] and represent Christ because of that.

It also brings to mind the much used metaphor in the Bible of a marriage between Israel and God. And now the church named as the bride of Christ. When a woman becomes a bride, most usually and traditionally, she takes her husband's family name.

This makes her apart of the family officially and legally. Ephesians 3:14-19 KJVS For this cause I bow my knees unto the Father of our Lord Jesus Christ, [15] Of whom the whole family in heaven and earth is named, [16] That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man; [17] That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love, [18] May be able to comprehend with all saints what is the breadth, and length, and depth, and height; [19] And to know the love of Christ, which passeth knowledge, that ye might be filled with all the fulness of God. Anyway, lots to think about i hope! That is the meaning behind the chorus of this poem/song.