“The scepticism which men affect towards their higher inspirations is often not an honest doubt, but a guilty negligence, and is a sign of narrow mind and defective wisdom.”

“Consistency is the sign of a narrow mind.”

“Honest differences are often a healthy sign of progress.”

“Philosophy arises from an unusually obstinate attempt to arrive at real knowledge. What passes for knowledge in ordinary life suffers from three defects: it is cocksure, vague and self-contradictory. The first step towards philosophy consists in becoming aware of these defects, not in order to rest content with a lazy scepticism, but in order to substitute an amended kind of knowledge which shall be tentative, precise and self-consistent.”

“It takes years and maturity to make the discovery that the power of faith is nobler than the power of doubt; and that there is a celestial wisdom in the ingenuous propensity to trust, which belongs to honest and noble natures.”

“No weakness of the human mind has more frequently incurred animadversion, than the negligence with which men overlook their own faults, however flagrant, and the easiness with which they pardon them, however frequently repeated.”