Thomas Carlyle, History of Friedrich II of Prussia…
“ Friedrich is now Fifty-one gone; unusually old for his age; feels himself an old man, broken with years and toils; and here lies his Kingdom in haggard slashed condition, worn to skin and bone: How is the King, resourceless, to remedy it? That is now the seemingly impossible problem. "Begin it,—thereby alone will it ever cease to be impossible!" Friedrich begins, we may say, on the first morrow morning. Labors at his problem, as he did in the march to Leuthen; finds it to become more possible, day after day, month after month, the farther he strives with it. ”
