C.N. Douglas, comp. Forty Thousand Quotations: Prose and Poetical. 1917.
Thinkers
Those who have finished by making all others think with them, have usually been those who began by daring to think with themselves.
The profound thinker always suspects that he is superficial.
A thinker is a person.
Beware when the great God lets loose a thinker on this planet.
In every epoch of the world, the great event, parent of all others, is it not the arrival of a Thinker in the world?
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.