Do not teach too many subjects and what you teach, teach thoroughly.

Without adventure civilization is in full decay.

Learning preserves the errors of the past, as well as its wisdom. For this reason, dictionaries are public dangers, although they are necessities.

The study of mathematics is apt to commence in disappointment.

Knowledge shrinks as wisdom grows.

Every organism requires an environment of friends, partly to shield it from violent changes, and partly to supply it with its wants.

Religion is the vision of something which stands beyond, behind, and within, the passing flux of immediate things; something which is real, and yet waiting to be realised; something which is a remote possibility, and yet the greatest of present facts; something that gives meaning to all that passes, and yet eludes apprehension; something whose possession is the final good, and yet is beyond all reach; something which is the ultimate ideal, and the hopeless quest.