我们做的每件事都是想让自己快乐，而避免痛苦，当痛苦多过快乐，或者快乐多过痛苦，改变就开始了。

Everything we do is to create pleasure or avoid pain. Change only happens when the pain outweighs the pleasure, or when the pleasure outweighs the pain.

youdao

痛苦过去后，是否要重新拥抱快乐或者是否要沉浸于消沉、怜悯之中就是我自己的选择了。

And when it does pass, it is my choice whether or not to embrace pleasure again or whether I want to remain covered in depression and pity.

youdao

你不能只是把快乐加起来然后减去痛苦，或者仅是把成功相加再减去失败，或者把学问相加再减去蒙昧和欺骗。

You can't just add up all the pleasures and subtract the pains, or add up all the accomplishments and subtract the failures, or add up all the knowledge and subtract the ignorance and deception.

youdao

You can't just add up all the pleasures and subtract the pains, or add up all the accomplishments and subtract the failures, or add up all the knowledge and subtract the ignorance and deception.

你不能只是把快乐加起来然后减去痛苦，或者仅是把成功相加再减去失败，或者把学问相加再减去蒙昧和欺骗。

耶鲁公开课 - 死亡课程节选