The wise man, so far as human finitude allows, endeavours to see the world as God sees it, sub-specie æternitatis, under the aspect of eternity. But, you may retort, we are surely right in being more concerned about future misfortunes, which may possibly be averted, than about past calamities about which we can do nothing.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“We are more concerned about a disaster in our own time than in the time of Genghis Khan. According to Spinoza, this is irrational. Whatever happens is part of the eternal timeless world as God sees it; to Him, the date is irrelevant. The wise man, so far as human finitude allows, endeavours to see the world as God sees it, sub-specie æternitatis, under the aspect of eternity. But, you may retort, we are surely right in being more concerned about future misfortunes, which may possibly be averted, than about past calamities about which we can do nothing. To this argument Spinoza’s determinism supplies the answer. Only ignorance makes us think that we can alter the future; what will be will be, and the future is as unalterably fixed as the past. That is why hope and fear are condemned:” source