It's all done with gears. Also pinions, snails, arbors; pawls and ratchets; and cam followers; cables, levers, bell cranks, and pivots.
For the machine, because of the way it is built, can work only in a given direction, no matter who pulls its levers.rudolf rocker
But what of the voice and judgment of conscience? The difficulty is that we have a conscience behind our conscience, an intellectual one behind the moral. … We can see quite well that our opinions of what is noble and good, our moral valuations, are powerful levers where action is concerned; but we must begin by refining these opinions and independently creating for ourselves new tables of values.georg brandes
The law is not a series of calculating machines where answers come tumbling out when the right levers are pushed.william o. douglas
Inventor: A person who makes an ingenious arrangement of wheels, levers and springs, and believes it civilization.ambrose bierce