hope springs eternal, while there's life, there's hope

don't mention it, not at all, think nothing of it, you're welcome

there is no one, there isn't a soul

(idiomatic) It’s not that bad; said to de-dramatize an event

(informal) what can I say, there's no doubt about it, you have to admit it

(very rare) an aggressive person will inevitably get themselves hurt

youth isn't what it used to be! the youth are all rotten!

Alternative form of il n'y a pas le feu au lac

seasons don't count for anything anymore! (used to complain that seasons aren't as well-defined as they used to be)

(colloquial) some, certain (people)