Full Idea
If every pleasure lasted long, and affected the whole body, then there would be no difference between one pleasure and another
Gist of Idea
Pleasures only differ in their duration and the part of the body affected
Source
Epicurus (fragments/reports [c.289 BCE]), quoted by Diogenes Laertius - Lives of Eminent Philosophers 10.31.08
Book Reference
Diogenes Laertius: 'Diogenes Laertius', ed/tr. Yonge,C.D. [Henry G. Bohn 1853], p.475
A Reaction
This seems to miss out on intensity, which is of great importance to most pleasure seekers. Also it is a pleasure to be alive, which is lifelong, but we barely notice it.