אָדָם מֵרִיחַ בָּאֶתְרוֹג – הוּא נֶהֱנָה וְהָאֶתְרוֹג אֵינוֹ חֲסַר כְּלוּם

ביטוי (אנגלית)

A man smells the etrog—he enjoys it, and the etrog loses nothing

הגדרה (אנגלית)

Metaphorically: Just as the etrog (citron) is not diminished when someone smells it, so too a person can share knowledge, wisdom, or talents with others without losing anything themselves — one benefits, and the other loses nothing.

(“And they were filled with the Holy Spirit from Moses’ spirit, yet Moses lacked nothing—like one who lights a candle from another, the first still burns, or like a man who smells an etrog, he enjoys it, and the etrog loses nothing” – Bamidbar Rabbah 13)