The time is already come when none are wretched but by their own fault.
 Samuel Johnson, The History of Rasselas, Prince of Abissinia (1759). copy citation

Context

“But the time will surely come when desire will no longer be our torment and no man shall be wretched but by his own fault. “This,” said a philosopher who had heard him with tokens of great impatience, “is the present condition of a wise man. The time is already come when none are wretched but by their own fault. Nothing is more idle than to inquire after happiness which Nature has kindly placed within our reach. The way to be happy is to live according to Nature, in obedience to that universal and unalterable law with which every heart is originally impressed;” source