Cicero, Tusculan Disputations 4.38

ID: FBFF0018-BDE8-43C7-88F2-80EB1ADF41CA
TRANSLATOR: King
CATEGORY: [[id:A3E4FC21-752F-413F-8289-0F0BD8B81FD4][Judgement]]
AUTHOR: Cicero

But now that the cause of disorders is discovered, all of which originate in judgements based upon beliefs and upon consent of the will, let us at least put an end to this discussion. […] There is one method of healing both distress and all other diseases of the soul, namely to show that all are matters of belief and consent of the will and are submitted to simply because such submission is thought to be right. This deception, as being the root of all evil, philosophy promises to eradicate utterly. Let us surrender ourselves therefore to its treatment and suffer ourselves to be cured; for when these evils settle upon us, not merely is it impossible to be happy but we canot be in a sound state either.