The History of Sexuality, Vol. 2: The Use of Pleasure | 
"The thing to note, however, is the concern it shows--one that was shared by ethics and medicine--with preparing the individual for a multitude of possible circumstances. One could not and one should not expect regimen to circumvent fate or alter nature. What could be expected of it was that it would enable one to react, with some degree of readiness, to unforseen events as they occurred."