译文：每天做的事，都要问心无愧才行，光阴容易逝去，希望能把这个信念坚持到老年。赏析：我们一生做事都要善于反省，做到防患于未然，避免发生更严重的错误。凡事粗心大意，鲁莽草率，必将带来祸害。

The writer is delegated to declare and to celebrate man's proven capacity for greatness of heart and spirit—for gallantry in defeat, for courage, compassion and love. In the endless war against weakness and despair, these are the bright rally flags of hope and of emulation.

Mathematics is the music of reason.