Charles Sanders Peirce — American Philosopher born on September 10, 1839, died on April 19, 1914

Charles Sanders Peirce was an American philosopher, logician, mathematician, and scientist who is sometimes known as "the father of pragmatism". He was educated as a chemist and employed as a scientist for 30 years. Today he is appreciated largely for his contributions to logic, mathematics, philosophy, scientific methodology, and semiotics, and for his founding of pragmatism... (wikipedia)

Every new concept first comes to the mind in a judgment.
It is impossible not to envy the man who can dismiss reason, although we know how it must turn out at last.
All the evolution we know of proceeds from the vague to the definite.
The essence of belief is the establishment of a habit; and different beliefs are distinguished by the different modes of action to which they give rise.
Doubt is an uneasy and dissatisfied state from which we struggle to free ourselves and pass into the state of belief; while the latter is a calm and satisfactory state which we do not wish to avoid, or to change to a belief in anything else.