Seneca · On self-control
Letters 116.7
At this point, I know, you will confront me with that common complaint against the Stoics: “Your promises are too great, and your counsels too hard. We are mere manikins, unable to deny ourselves everything. We shall sorrow, but not to any great extent; we shall feel desires, but in moderation; we shall give way to anger, but we shall be appeased.”
Seneca, Letters to Lucilius 116.7, translated by Richard Mott Gummere