You can't change the past, but you can ruin the present by worrying about the future.
Peace is not the absence of war, but a virtue based on strength of character.
The best way to predict the future is to study the past.
 释义:身体没有受到饥饿和寒冷的痛苦,这是上天不曾亏待我;若是我的学问无所进步,我有何颜面去面对上天呢?