Alternative form of ce qu'il ne faut pas entendre

seeing is believing

one must choose the lesser of two evils

Alternative form of entre deux maux, il faut choisir le moindre: one must choose the lesser of two evils

still waters run deep

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

it takes all kinds to make a world, it takes all sorts, variety is the spice of life

Alternative form of il faut battre le fer pendant qu'il est chaud

in for a penny, in for a pound

One must let sleeping dogs lie