what doesn't kill you makes you stronger

to be in for more surprises, to have more surprises laying in store for one, to have more surprises coming one's way

not need to be told twice

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

(informal) but me no buts; there'll be no "but"

Alternative form of on n'attrape pas des mouches avec du vinaigre

Rome wasn't built in a day

to be nothing to write home about (to be mediocre; to be nothing out of the ordinary; to be nothing special)

Rome wasn’t built in a day

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