When you pronounce to yourself in your heart the Name of God, of the Lord, or that of the most Holy Trinity, or of the Lord of Sabaoth, or of the Lord Jesus Christ, then in that Name you have the Lord’s whole being; in it is His infinite mercy, His boundless wisdom, His inaccessible light, omnipotence, and immutability. Approach this all-creative, all-keeping and all-ruling Name in our thoughts and heart with the fear of God, and with faith and love. This is why God’s commandment strictly forbids us to use God’s Name in vain, because His Name is Himself, one God in Three Persons, an incomplex being, represented and contained in one single word, although at the same time He is not contained or limited either by it or by anything that exists.
St. John of Kronstadt, My Life in Christ, p. 358 (Jordanville edition, 1984)
