If [science] tends to thicken the crust of ice on which, as it were, we are skating, it is all right. If it tries to find, or professes to have found, the solid ground at the bottom of the water it is all wrong. Our business is with the thickening of this crust by extending our knowledge downward from above, as ice gets thicker while the frost lasts; we should not try to freeze upwards from the bottom.

Friends are like money, easier made than kept.

The course of true anything never does run smooth.

Inspiration is never genuine if it is known as inspiration at the time. True inspiration always steals on a person; its importance not being fully recognized for some time.

There is one class of mind that loves to lean on rules and definitions, and another that discards them as far as possible. A faddist will generally ask for a definition of faddism, and one who is not a faddist will be impatient of being asked to give one.

If a man knows not life which he hath seen, how shall he know death, which he hath not seen?

Creativity is so delicate a flower that praise tends to make it bloom, while discouragement often nips it in the bud.