The source of all humor is not laughter, but sorrow.

Often a quite assified remark becomes sanctified by use and petrified by custom; it is then a permanency, its term of activity a geologic period.

There are some natures which never grow large enough to speak out and say a bad act is a bad act, until they have inquired into the politics or the nationality of the man who did it.

One must keep one's character. Earn a character first if you can, and if you can't, then assume one. From the code of morals I have been following and revising and revising for 72 years I remember one detail. All my life I have been honest - comparatively honest. I could never use money I had not made honestly - I could only lend it.

War talk by men who have been in a war is always interesting; whereas moon talk by a poet who has not been in the moon is likely to be dull.

I'm pushing 60 years of age...and that's enough exercise for me.

Gratitude and treachery are merely the two extremities of the same procession. You have seen all of it that is worth staying for when the band and the gaudy officials have gone by.