Friedrich Nietzsche? Viktor E. Frankl? Thomas Common? Anthony M. Ludovici? Walter Kaufmann? R. J. Hollingdale? Ilse Lasch? Question for Quote Investigator: Life can be aggravating and even agonizing. Yet, a steady internal purpose helps to make difficulties endurable together with the thought that happiness and pleasure will someday return. Here is an apposite adage: One …