The E. Coli bacterium propels itself with a 'motor' only one-millionth of an inch in diameter, a thousand times smaller than the tiniest motors built to date by man. The rotation of the bacterial motor comes from a current of protons. The efficiency of the motor approaches 100 per cent.
1 Therefore, having been justified by faith, we have[a] peace with God through our Lord Jesus Christ, 2 through whom also we have access by faith into this grace in which we stand, and rejoice in hope of the glory of God. 3 And not only that, but we also glory in tribulations, knowing that tribulation produces perseverance; 4 and perseverance, character; and character, hope. - Romans 5:1-4 NKJ