'Don't you worry, and don't you hurry.' I know that phrase by heart, and if all other music should perish out of the world it would still sing to me.

There are those who scoff at the schoolboy, calling him frivolous and shallow: Yet it was the schoolboy who said 'Faith is believing what you know ain't so'.

You can't pray a lie -- I found that out.

I am not interested to know whether vivisection produces results that are profitable to the human race or doesn't...The pain which it inflicts upon unconsenting animals is the basis of my enmity toward it, and it is to me sufficient justification of the enmity without looking further.

Literature is well enough, as a time-passer, and for the improvement and general elevation and purification of mankind, but it has no practical value.

We are always more anxious to be distinguished for a talent which we do not possess, than to be praised for the fifteen which we do possess. Sometimes we are too close to the scene, to see clearly. We "know" ourselves so well that we cannot see how we are perceived by others. Our opinion of ourselves is only "one" opinion and it may not be the truth.

One of the most striking differences between a cat and a lie is that a cat has only nine lives.