I have a plan-to go mad.

They were renewed by love; the heart of each held infinite sources of life for the heart of the other.

... you can never be sure of what has passed between husband and wife or lover and mistress.

Never mind a little dirt, if the goal is splendid!

How many ideas have there been in the history of man which were unthinkable ten years before they appeared?

There is nothing in the world more difficult than candor, and nothing easier than flattery. If there is a hundredth of a fraction of a false note to candor, it immediately produces dissonance, and as a result, exposure. But in flattery, even if everything is false down to the last note, it is still pleasant, and people will listen not without pleasure; with coarse pleasure, perhaps, but pleasure nevertheless.

Love animals: God has given them the rudiments of thought and joy untroubled. Do not trouble their joy, don't harrass them, don't deprive them of their happiness, don't work against God's intent. Man, do not pride yourself on superiority to animals; they are without sin, and you, with your greatness, defile the earth by your appearance on it, and leave the traces of your foulness after you - alas, it is true of almost every one of us!