“And whatsoever ye do,” he saith, “in word or in deed, do all in
the name of the Lord Jesus, giving thanks to God the Father through
Him.” (Colossians 3:17)

For if we thus do, there will be nothing polluted, nothing unclean, wherever Christ is called on. If thou eat, if thou drink, if thou marry, if thou travel, do all in the Name of God, that is, calling Him to aid thee: in everything first praying to Him, so take hold of thy business.

Wouldest thou speak somewhat? Set this in front. For this cause we also place in front of our epistles the Name of the Lord. Wheresoever the Name of God is, all is auspicious. For if the names of Consuls make writings sure, much more doth the Name of Christ. Or he means this; after God say ye and do everything, do not introduce the Angels besides.

Dost thou eat? Give thanks to God both before and afterwards. Dost thou sleep? Give thanks to God both before and afterwards. Launchest thou into the forum? Do the same — nothing worldly, nothing of this life. Do all in the Name of the Lord, and all shall be prospered to thee. Whereonsoever the Name is placed, there all things are auspicious. If it casts out devils, if it drives away diseases, much more does it render business easy.

[St. John Chrysostom, Homily 9 on Colossians]