FRUGALITY. Make no expense but to do good to others or yourself; i.e., waste nothing.

Old minds are like old horses; you must exercise them if you wish to keep them in working order.

纵欲之心正炽烈时，一想到将会卧病痛苦，兴致如寒冰；逐利之心正浓烈时，一想到将会命丧黄泉，味道如同嚼蜡。

有了实际工作的经验，幼儿的自我就会逐渐发展强化。

最大的风险是不冒任何风险。在一个快速变化的世界里，唯一注定失败的策略就是不冒险。