“The movement of modern philosophy is back towards the position of the old Ionian philosophers, but strengthened and clarified by sound scientific ideas. If I publish my criticism on Comte, I should have to re-write it as a summary of philosophical ideas from the earliest times. The thread of philosophical development is not on the lines usually laid down for it. It goes from Democritus and the rest to the Epicureans, and then the Stoics, who tried to reconcile it with popular theological ideas, just as was done by the Christian Fathers. In the Middle Ages it was entirely lost under the theological theories of the time; but reappeared with Spinoza, who, however, muddled it up with a lot of metaphysics which made him almost unintelligible.”

Quoted from F. Capra, The Tao of Physics.

trans. Michael Chase, p. 272
La Philosophie comme manière de vivre (2001)

Source: Zettel

Robert H. Jackson [citation needed]

Source: In Praise of Philosophy (1963), p. 5
Context: Even those who have desired to work out a completely positive philosophy have been philosophers only to the extent that, at the same time, they have refused the right to install themselves in absolute knowledge. They taught not this knowledge, but its becoming in us, not the absolute but, at most, our absolute relation to it, as Kierkegaard said. What makes a philosopher is the movement which leads back without ceasing from knowledge to ignorance, from ignorance to knowledge, and a kind of rest in this movement.

Philosophy and Religion 1804)

Quoting Edwards, an old schoolmate of Johnson's (17 April 1778)
The Life of Samuel Johnson, LL.D. (1791)

Source: The Genteel Tradition in American Philosophy (1911), pp. 48-49
Context: Professional philosophers are usually only apologists: that is, they are absorbed in defending some vested illusion or some eloquent idea. Like lawyers or detectives, they study the case for which they are retained.

The Mathematical Foundations of Quantum Theory (1978)