An Introduction to Philosophy

Philosophy once meant the whole body of scientific knowledge. Afterward it came to mean the whole body of knowledge which could be attained by the mere light of human reason, unaided by revelation.

says Herbert Spencer,

"is un-unified knowledge; Science is partially-unified knowledge; Philosophy is completely-unified knowledge."

"Knowledge of the lowest kind,"

who undertakes to construct the whole system of reality out of concepts, and who, with his immediate predecessors, brought philosophy for a while into more or less disrepute with men of a scientific turn of mind.

Boyle and Newton; upon Hegel (1770-1831)

who, without knowing anything worth mentioning about natural science, had the courage to develop a system of natural philosophy,

Schelling (1775-1854)

who believed that the philosopher, by mere thinking, could lay down the laws of all possible future experience

Fichte (1762-1814)