if life on earth is despaired of, it is only in heaven that peace can be sought.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“But even in this conception there is something permanent, namely progress itself and its immanent goal. And a dose of disaster is likely to bring men’s hopes back to their older super-terrestrial forms: if life on earth is despaired of, it is only in heaven that peace can be sought. The poets have lamented the power of Time to sweep away every object of their love. Time doth transfix the flourish set on youth, And delves the parallels in beauty’s brow, Feeds on the rarities of nature’s truth,” source