For verily I say unto you, That whosoever shall say unto this mountain, Be removed, and be cast into the sea; and shall not doubt in his heart, but shall believe that those things which he said shall come to pass; he shall have whatsoever he said.
All Commentaries on Mark 11:23 Go To Mark 11
Augustine of Hippo
AD 430
Note that Jesus said “for him,” not “for me,” and not “for the Father.” Yet it is certain that no human being does such a thing without God’s gift and workings. Mark well that even if no actual instances of perfect righteousness may be found among humans, that does not rule out perfect righteousness as if it were formally impossible. For it might have been realized if only sufficient responsive willing had been applied, enough to suffice for so great a deed.