Called, Equipped, Anointed By God 2 Mike Hawkins teaches on Rom. 11:29
"For the gifts and calling of God are without repentance."
He explains that this is talking about ministries or offices—the gifts and calling of God.
People are gifted by the Holy Spirit to stand in certain offices, but we’re not all endowed by the Spirit to do the same things, or to stand in the same offices.
To say this another way, people are anointed by the Holy Spirit to obey certain callings, but we don’t all have the same gift or anointing.