It is a curious fact that in bad days we can very vividly recall the good time that is now no more; but that in good days, we have only a very cold and imperfect memory of the bad.

The present is the only reality and the only certainty.

The majority of men... are not capable of thinking, but only of believing, and... are not accessible to reason, but only to authority.

Opinion is like a pendulum and obeys the same law. If it goes past the centre of gravity on one side, it must go a like distance on the other; and it is only after a certain time that it finds the true point at which it can remain at rest.

Just remember, once you're over the hill you begin to pick up speed.

This actual world of what is knowable, in which we are and which is in us, remains both the material and the limit of our consideration.

Compassion for animals is intimately associated with goodness of character, and it may be confidently asserted that he who is cruel to animals cannot be a good man.