In Pirkei Avot 2:21 there is a saying:
לא עליך המלאכה לגמור, ולא אתה בן חורין לבטל ממנה
You are not obligated to complete the work, but neither are you free to desist from it
It would sound like:
Non hai l'obbligo di terminare l'opera, ma allo stesso tempo non sei libero di evitarla
My question is if there a saying or a proverb with a similar meaning in Italian, such that it is recognizable by people with an Italian cultural background