• c’est la vie (that's life; that's how things happen)
• ca va sans dire (it goes without saying)
• corruptio optimi pessima (the corruption of the best is the worst of all)
• dum spiro, spero (while I breathe, I hope)
• dum vivimus vivamus (while we live, let us live)
• est modus in rebus (there is a proper measure in things)
• folie de grandeur (delusion of greatness)
• odi et amo (I hate and I love)
• peu a peu (little by little)
• sunt lacrimae rerum (there are tears for things)
• tanche de vie (slice of life)
• tempus fugit (time flies)
• tristesse (melancholy)
• vita brevis (life is short)
• voila tout (that’s all)

1 [http://www.dailywritingtips.com/150-foreign-expressions-to-inspire-you/] // 2 [http://www.dailywritingtips.com/225-foreign-phrases-to-inspire-you/]