perfection does not exist

Alternative form of c'est pas demain la veille

(games, idiomatic) that's not fair game

let's take a rain check! we'll do it another time! that will be for next time!

it's only fair! fair's fair!

except, except that; although; but

better safe than sorry, you can never be too careful

once one has done something, one does not have to worry about it anymore (used to encourage someone to finish what they have to do)

comparisons don't prove anything / one shouldn't compare things that aren't comparable; it's not the same

don't shoot the messenger (the bearer of bad news should not be held accountable for it)