B. F. Skinner said this quote

I will be dead in a few months. But it hasn't given me the slightest anxiety or worry. I always knew I was going to die.

~ B. F. Skinner

A failure is not always a mistake, it may simply be the best one can do under the circumstances. The real mistake is to stop trying.

~ B. F. Skinner

I won't say that I'm an agnostic, since agnosticism maintains that one cannot know... but I'm not averse to the idea of some intelligence or some organizing force that set up the initial conditions of the universe in such a way that ultimately generated stars, planets and life.

~ B. F. Skinner

If you're old, don't try to change yourself, change your environment.

~ B. F. Skinner