The only extant fragment of the tragedian Melanthius, quoted by Plutarch in his On the Restraint of Anger section 453, and very frequently in late antiquity:
[θυμός, ὅσπερ εἴωθε] τὰ δεινὰ πράττειν, τὰς φρένας μετοικίσας.
“[Anger, which is accustomed] to turn reason out of doors, and then does terrible things.
In the last year or so I have been experimenting with a hypothesis that every speech-act lies somewhere on a continuum the extreme poles of which are anger and love.
I dare you, dear reader, should you ever find me, to try to go a whole day without losing your peace.