Ether 12:8–22 is filled with examples of “wonders and marvels done by faith” (chapter summary for Ether 12). The Lectures on Faith explain that faith is the principle of power to do miracles:
“Faith is not only the principle of action, but of power also, in all intelligent beings, whether in heaven or on earth. …
“… It was by faith that the worlds were framed. God spake, chaos heard, and worlds came into order by reason of the faith there was in Him. So with man also; he spake by faith in the name of God, and the sun stood still, the moon obeyed, mountains removed, prisons fell, lions’ mouths were closed, the human heart lost its enmity, fire its violence, armies their power, the sword its terror, and death its dominion; and all this by reason of the faith which was in him” ([1985], 3, 5).