You can’t learn if you think you already know. You can’t get better if you think you are the best. - Ryan Holiday

Do I need this? Or is it really about ego?

Vires acquirit eundo (We gather strength as we go).

Take inventory for a second. What do you dislike? Whose name fills you with revulsion and rage? Now ask: Have these strong feelings really helped you accomplish anything? Take an even wider inventory. Where has hatred and rage ever really gotten anyone? Especially because almost universally, the traits or behaviors that have pissed us off in other people — their dishonesty, their selfishness, their laziness — are hardly going to work out well for them in the end. Their ego and shortsightedness contains its own punishment. The question we must ask for ourselves is: Are we going to be miserable just because other people are?