A half truth, like half a brick, is always more forcible as an argument than a whole one. It carries better.
“It is no use asking me or anyone else how to dig... Better to go and watch a man digging, and then take a spade and try to do it.”
“You must not demand the failure of your peers, because the more good things that are around in film, in television, in theater - why the better it is for all of us.”