One can bring no greater reproach against a man than to say that he does not set sufficient value upon pleasure, and there is no greater sign of a fool than the thinking that he can tell at once and easily what it is that pleases him.
 Samuel Butler, The Note-Books of Samuel Butler (1912). copy citation

Context

“Englishmen, and perhaps Germans, consider first whether they ought to like a thing and often never reach the questions whether they do like it and whether it will hurt. There is much to be said for both systems, but I suppose it is best to combine them as far as possible.
On Knowing what Gives us Pleasure i
One can bring no greater reproach against a man than to say that he does not set sufficient value upon pleasure, and there is no greater sign of a fool than the thinking that he can tell at once and easily what it is that pleases him. To know this is not easy, and how to extend our knowledge of it is the highest and the most neglected of all arts and branches of education. Indeed, if we could solve the difficulty of knowing what gives us pleasure, if we could find its springs, its inception and earliest modus operandi, we should have discovered the secret of life and development, for the same difficulty has attended the development of every sense from touch onwards, and no new sense was ever developed without pains.” source