There's an ancient stoic prayer:

ta eph'hemin, ta ouk eph'hemin,

which means -

"what's up to us, what's not up to us."

The modern serenity prayer seems to be inspired by this very stoic prayer -

"God, grant me the serenity

to accept the things I cannot change,

Courage to change the things I can,

and Wisdom to know the difference."