Sincerity is moral truth.

Books minister to our knowledge, to our guidance, and to our delight, by their truth, their uprightness, and their art.

Science is the systematic classification of experience.

Originality is independence, not rebellion; it is sincerity, not antagonism.

It is unhappily true that much insincere Literature and Art, executed solely with a view to effect, does succeed by deceiving the public.

No man ever made a great discovery without the exercise of the imagination.

We must never assume that which is incapable of proof.

The true function of philosophy is to educate us in the principles of reasoning and not to put an end to further reasoning by the introduction of fixed conclusions.

Insincerity is always weakness; sincerity even in error is strength.

To write much, and to write rapidly, are empty boasts. The world desires to know what you have done, and not how you did it.

Good writers are of necessity rare.

Don’t trivialize the fact that your life is diminishing.

Pick the weeds and keep the flowers.

With every single fiber of her soul, she wanted to be With every single fiber of her soul, she wanted to be

Don't live so that your children go unled because of habits that leave you uninspired.

I loved the idea that biology was logical.

The difficulty lies, not in the new ideas, but in escaping the old ones, which ramify, for those brought up as most of us have been, into every corner of our minds.

As bad as it might be to destroy a creature made in God's image, it might be very much worse to be creating them after images of one's own.

I have some Russian friends. But probably only 10 percent. I don't hang out usually in the big Russian communities in Brooklyn and New Jersey.

Everything is contingent, and there is also chaos.

He was waiting for something from me. Acknowledgement. Validation. Commiseration, perhaps. I couldn’t even look at him because I was afraid of feeling any more than I already did.