To laugh, if but for an instant only, has never been granted to man before the fortieth day from his birth, and then it is looked upon as a miracle of precocity.
In comparing various authors with one another, I have discovered that some of the gravest and latest writers have transcribed, word for word, from former works, without making acknowledgment.
Man is the only one that knows nothing, that can learn nothing without being taught. He can neither speak nor walk nor eat, and in short he can do nothing at the prompting of nature only, but weep.
