One might define adulthood as the age at which a person learns that he must die ...and accepts his sentence undismayed.

Nobody has ever seen an electron. Nor a thought. You can't see a thought, you can't measure, weigh, nor taste it- but thoughts are the most real things in the Galaxy.

A zygote is a gamete's way of producing more gametes. This may be the purpose of the universe.

Stupidity is the only natural capital offense.

We have our hands, we have our brains, we have the challenge all around us, and we have within (from whatever source) the will to strive. That is enough; there is no need to assert 'belief' in that which we do not, as yet, know.

The death rate is the same for us as for anybody ... one person, one death, sooner or later.

One could write a history of science in reverse by assembling the solemn pronouncements of highest authority about what could not be done and could never happen.