THE ENCHIRIDION Ch. 34 (source: Project Gutenberg)
If you are dazzled by the semblance of any promised pleasure, guard yourself against being bewildered by it; but let the affair wait your leisure, and procure yourself some delay. Then bring to your mind both points of time—that in which you shall enjoy the pleasure, and that in which you will repent and reproach yourself, after you have enjoyed it—and set before you, in opposition to these, how you will rejoice and applaud yourself if you abstain. And even though it should appear to you a seasonable gratification, take heed that its enticements and allurements and seductions may not subdue you, but set in opposition to this how much better it is to be conscious of having gained so great a victory.