The greater part of mankind may be divided into two classes; that of shallow thinkers who fall short of the truth; and that of abstruse thinkers who go beyond it.
There are very few original thinkers in the world; the greatest part of those who are called philosophers have adopted the opinions of some who went before them.
Thinkers are scarce as gold; but he whose thoughts embrace all his subject, and who pursues it uninterruptedly and fearless of consequences, is a diamond of enormous size.