I get in the dumps at times, and don't open my mouth for days on end. You must not think I am sulky when I do that. Just let me alone, and I'll soon be right.

Populus me sibilat, at mihi plaudo Ipse domi stimul ac nummos contemplar in arca. (The public hiss at me, but I cheer myself when in my own house I contemplate the coins in my strong-box.)

It is a mistake to confound strangeness with mystery.

My dear Watson," said [Sherlock Holmes], "I cannot agree with those who rank modesty among the virtues. To the logician all things should be seen exactly as they are, and to underestimate one's self is as much a departure from truth as to exaggerate one's own powers.

It is hardly fair to blame America for the state of San Francisco, for its population is cosmopolitan and its seaport attracts the floating vice of the Pacific; but be the cause what it may, there is much room for spiritual betterment.

Living, as I do, in an educated and scientific atmosphere, I could not have conceived that the first principles of zoology were so little known. Is it possible that you do not know the elementary fact in comparative anatomy, that the wing of a bird is really the forearm, while the wing of a bat consists of three elongated fingers with membranes between?

His sanguine spirit turns every firefly into a star.