I never could keep a promise. I do not blame myself for this weakness, because the fault must lie in my physical organization. It is likely that such a very liberal amount of space was given to the organ which enables me to make promises that the organ which should enable me to keep them was crowded out. But I grieve not. I like no half-way things. I had rather have one faculty nobly developed than two faculties of mere ordinary capacity.

The secret of success is making your vocation your vacation.

Everything human is pathetic

Make your vocation your vacation. That is the secret to success.

And always we had wars, and more wars, and still other wars - all over Europe, all over the world. "Sometimes in the private interest of royal families," Satan said, "sometimes to crush a weak nation; but never a war started by the aggressor for any clean purpose - there is no such war in the history of the race."

More than one cigar at a time is excessive smoking.

You don't know about me, without you have read a book by the name of 'The Adventures of Tom Sawyer,' but that ain't no matter. That book was made by a Mr. Mark Twain, and he told the truth, mainly.