---

No man can be happy without a friend, nor be sure of his friend until he is unhappy.

---

When once a man has made celebrity necessary to his happiness, he has put it in the power of the weakest and most timorous malignity, if not to take away his satisfaction, at least to withhold it. His enemies may indulge their pride by airy negligence and gratify their malice by quiet neutrality.

---

Doubt is not a pleasant condition but certainty is an absurd one.

---

You have not converted a man because you have silenced him.

---

To do nothing is sometimes a good remedy.

---

Great events make me quiet and calm; it is only trifles that irritate my nerves.

---

Education alone can conduct us to that enjoyment which is, at once, best in quality and infinite in quantity.

---

Creativity is allowing yourself to make mistakes. Art is knowing which ones to keep.

---

Every extension of knowledge arises from making the conscious the unconscious.

---

The first duty of love is to listen.

---