It is as absurd to say that a man can't love one woman all the time as it is to say that a violinist needs several violins to play the same piece of music.

The love of nature is the only love that does not deceive human hopes.

When there is an old maid in the house, a watchdog is unnecessary.

When will conventional good manners become attractive? When will ladies of fashion exhibit their shoulders a little less and their affability and wit a little more?

Several sorts of memory exist in us; body and mind each possesses one peculiar to itself. Nostalgia, for instance, is a malady of the physical memory.

It is beyond a doubt that during the sixteenth century, and the years immediately preceding and following it, poisoning had been brought to a pitch of perfection which remains unknown to modern chemistry, but which is indisputably proved by history. Italy, the cradle of modern science, was at that time, the inventor and mistress of these secrets, many of which are lost.

A careful observation of Nature will disclose pleasantries of superb irony. She has for instance placed toads close to flowers.