C'est la vie.

Sometimes things are going a different way than we expect. Then it means, chin up, arrange crown and keep on walking, nightingale. It cannot be that bad - c'est la vie!

Vocabulary:
c'est (derived from "ce est" = it is/that is/this is)
la vie = the life
mon ami = my friend ('mon' is a masculine possessive pronoun in French, suggesting that friend to be male)
et = and
ce n'est pas = it is not
Nachtigall = nightingale (a German word)