"O praise the Lord, all ye nations: praise Him, all ye people. For His merciful kindness is great toward us: and the truth of the Lord endureth for ever. Praise ye the Lord" (Psalm 117:1-2).

"So then neither is he that planteth any thing, neither he that watereth; but God that giveth the increase" (I Corinthians 3:7).

"But thou, O man of God, flee these things; and follow after righteousness, godliness, faith, love, patience, meekness" (I Timothy 6:11).

There are just two places in the New Testament where a person is called a "man of God" (both of which are in Paul's letters to Timothy), and they reveal the attributes which warrant us to call someone a man (or woman) of God.

"And the word of the Lord came unto [Elijah], saying, Arise, get thee to Zarephath, which belongeth to Zidon, and dwell there: behold, I have commanded a widow woman there to sustain thee" (I Kings 17:8-9).

"Unto whom the prince of the eunuchs gave names: for he gave unto Daniel the name of Belteshazzar; and to Hananiah, of Shadrach; and to Mishael, of Meshach; and to Azariah, of Abednego" (Daniel 1:7).