out of the mouths of babes comes truth

enough is as good as a feast; you can have too much of a good thing

if wishes were horses, beggars would ride; if my aunt had balls, she'd be my uncle

honey catches more flies than vinegar; you can catch more flies with honey than with vinegar

in the land of the blind, the one-eyed man is king

you've got to crack a few eggs to make an omelette

(informal, figuratively) not to see something which is obvious, right under one's nose; to be dim-sighted because one is hungover and half-asleep; to be bleary-eyed

if one is forgetful or doesn't think ahead, one will have to walk more frequently

Alternative form of ce n'est pas à un vieux singe qu'on apprend à faire des grimaces

don't try to teach grandma how to suck eggs