לא עליך המלאכה לגמור ולא אתה בן חורין להיבטל ממנה

“It is not incumbent upon you to finish the work, but neither are you free to desist from it.”

No one person must complete every great task alone, but everyone must still contribute their part.

— Traditional Israel Wisdom, Israel

Source: Rabbi Tarfon, Pirkei Avot (Ethics of the Fathers) 2:16, Mishnah, c. 200 CE