Public domain. This passage is in the public domain. Mark Twain died in 1910, more than 70 years ago, and the work was first published in 1894. You can copy, print, read aloud or sell it without asking permission; a credit is kind but not required. The text is copied word for word from the Project Gutenberg edition linked here.
Behold, the fool saith, "Put not all thine eggs in the one basket"—which is but a manner of saying, "Scatter your money and your attention;" but the wise man saith, "Put all your eggs in the one basket and—watch that basket"
Annual income twenty pounds, annual expenditure nineteen nineteen and six, result happiness. Annual income twenty pounds, annual expenditure twenty pounds ought and six, result misery.