Keep This Thing

Riddle: You must keep this thing, its loss will affect your brothers. For once yours is lost, it will soon be lost by others. What is it?

Answer: Your Temper.

Source: https://www.riddles.com/295

You must keep this thing, its loss will affect your brothers. For once yours is lost, it will soon be lost by others. What is it? — Keep This Thing by Anonymous v1.

Riddle: You must keep this thing, its loss will affect your brothers. For once yours is lost, it will soon be lost by others. What is it? Answer: Your Temper. — by Anonymous v2.