“One who holds back rising anger as one would rein in a rolling chariot, that person I call a true charioteer; others merely hold the reins.”
Canonical Pali Original: Yo ve uppatitaṃ kodhaṃ, rathaṃ bhantaṃva vāraye; Tamahaṃ sārathiṃ brūmi, rasmiggāho itaro jano.
— Gautam Buddha
The Awakened One, Founder of Dhamma
Pali Canon: Dhammapada 17.222 on conquering reactive emotional outbursts through resolute mindful restraint.