一个“履行”的话语不是真或假，而是成功或失败。
A 'performative' utterance is not true or false， but happy or unhappy.
Confidence is key. If you don't believe in yourself, no one else will.
解析：教导学生，不到他想弄明白而不得的时候，不去开导他；不到他想出来却说不出来的时候，不去启发他。
The only one who's really judging you is yourself.
我一直相信真相是表演中最重要的东西。
Machinery and labor-saving devices are only valuable as they serve to reduce the cost of manufacture.
I don't rap for dead presidents. I'd rather see the president dead.