Here are some Latin quotes that I find inspiring:
Quidquid latine dictum sit, altum videtur.
— Whatever is written in Latin, appears profound.
Destitutus ventis, remos adhibe.
— If the wind fails, take the oars.
Mus uni non fidit antro.
— A mouse does not rely on just one hole.
Nil satis nisi optimum.
— Nothing but the best is good enough.
Aut viam inveniam aut faciam.
— I shall either find a way or make one.
Audentes fortuna iuvat.
— Fortune favours the brave.
Quot homines tot sententiae.
— As many men, as many opinions.