Known sourcecanonical
"Everything, saith Epictetus, hath two handles,--the one to be held by, the other not."
Robert Burton / Anatomy of Melancholy. Part ii. Sect. 2, Memb. 3.
Bartlett's Familiar Quotations, 9th ed. (Little, Brown, 1905), public domain
Bartlett's Familiar Quotations, 9th ed. (Little, Brown, 1905), public domain