减肥产品让人们相信，没有痛苦就可以有收获，生活没有阻力，也不需要努力。

Diet products make people believe that gain comes without pain, and that life can be without resistance and struggle.

youdao

哪里有痛苦，我们的义务就在哪里。

Where there is suffering, there is duty.

youdao

成长往往有痛苦与害怕。

Growth is often painful and scary.

youdao

So the pain you're suffering now is actually instrumentally valuable, useful as a means, even though it's intrinsically bad.

所以你现在忍受的痛苦,是有利用价值的，作为手段是有用的，尽管痛苦本身是坏的。

耶鲁公开课 - 死亡课程节选

I'm inclined to think there's more to the best kind of life than just having pleasure and avoiding pain.

我倾向认为人生有比享受快乐,避免痛苦更好的东西。

耶鲁公开课 - 死亡课程节选

Now the pain of a bite, being bit, and then the pain and fear of that is an unconditioned stimulus, unconditioned response.

咬伤所带来的疼痛感，和有此所带来的痛苦与恐惧,就是无条件刺激和无条件反应。

耶鲁公开课 - 心理学导论课程节选