"I'm an optimist, and I think if you're a pessimist that's just an excuse for inaction."

VOA: standard.2010.02.24

That's what the optimist thinks-- not just for themselves individually, but for everybody, the total is always positive.

那是乐观主义者的想法-,而且不但是对他们自己，而是对所有人，等式结果总是正数。

耶鲁公开课 - 死亡课程节选

I suppose, again, the optimist says, "Yeah, death is bad, but life is good, sufficiently good to outweigh the badness of the fact that we're going to die.

我假设，再一次，乐观主义者说，“死亡不好，但是生命好，好到足以盖过我们会死,这个事实的坏处。

耶鲁公开课 - 死亡课程节选

"Even an optimist like Frank Drake estimates that there would be no more than about in the galaxy, which means that the nearest one is likely to be about 1,000 light years away."

VOA: standard.2010.04.16

And he had a miserable life until then because he always had illnesses, some of which might be even psychosomatic. So he was the optimist and the one who lived well with the pessimist.

那之前他生活得很悲惨，因为,他总是病魔缠身，有些是精神方面的疾病,因此他属于乐观主义者,而且能够和悲观主义者相处的很好。

麻省理工公开课 - 电影哲学课程节选