﹝心恬集﹞悲觀者樂觀者現實者

悲觀者埋怨刮風；樂觀者靜候風變；現實者調整風帆。
The pessimist complains about the wind, the optimist expects it to change, and the realist adjusts the sails.
威廉‧亞瑟‧沃德(William Arthur Ward)