---

Fire is the test of gold; adversity, of strong men.

---

There is no great genius without some touch of madness.

---

Would that the Roman people had a single neck [to cut off their head].

---

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.

---

Indeed, what is there that does not appear marvelous when it comes to our knowledge for the first time? How many things, too, are looked upon as quite impossible until they have been actually effected?

---

There is always something new out of Africa.

---

The advice of friends must be received with a judicious reserve; we must not give ourselves up to it and follow it blindly, whether right or wrong.

---

The best plan is to profit by the folly of others.

---

One good turn deserves another.

---

A liar should have a good memory.

---