"The imagination is a great source of error."

"There is nothing in the mind of man that is not first in the senses, or in the operations of the mind itself."

"All doctrines, however, are not to be admitted on the same footing. Each must be tried by its own proper evidence; and as this evidence is more or less convincing, we must assent to it more or less st…"

"The life of man is a perpetual flux of motion. All his thoughts, sentiments, and actions are in a continual succession, and never remain for any considerable time in the same state."

"The only method of freeing us from these abstruse questions, is to enquire seriously into the nature of human understanding, and show, from an exact analysis of its powers and capacities, that it is b…"