Letter 124 — On the True Good as Attained by Reason (§3)

“Besides, those who are too fond of pleasure and those who fear pain to the greatest degree would in that case not deserve reproof. But we condemn men who are slaves to their appetites and their lusts, and we scorn men who, through fear of pain, will dare no manly deed. But what wrong could such men be committing if they looked merely to the senses as arbiters of good and evil? For it is to the senses that you and yours have entrusted the test of things to be sought and things to be avoided!”