If it cannot be said of Comte that he has created a science, it may be said truly that he has, for the first time, made the creation possible. This is a great achievement, and, with the extraordinary merit of his historical analysis, and of his philosophy of the physical science,. is enough to immortalize his name. (John Stuart Mill).

Comte is now generally admitted to have been the most eminent and important of that interesting group of thinkers whom the overthrow of old institutions in France turned towards social speculation. (John Morley)