- « Cher adulte, calme-toi ? » is "Dear adult, calm down?"... 

Pousse, mais pousse égal.

Il y a une grosse nuance entre

une insouciance de jeunesse,

sans malice, et son contraire.

Alors, prends un respir,

il y a beaucoup pire.

rough translation...

« Pousse, mais pousse égal » literally translated is "Push, but push equally"... it wouldn't make much sense in English... so the close equivalent (paraphrasing it, really) I came up with is the following first line...

Put effort into it, but do it reasonably.

There's a huge contrast between

a youthful act of unawareness,

without malice, and its opposite.

So, take a breath,

there's a lot worse.