If, in each hour, a man could learn a single fragment of some branch of knowledge, a single rule of some mechanical art, a single pleasing story or proverb (the acquisition of which would require no effort), what a vast stock of learning he might lay by. Seneca is therefore right when he says: "Life is long, if we know how to use it." It is consequently of importance that we understand the art of making the very best use of our lives.
John Amos ComeniusThe saying "He who teaches others, teaches himself" is very true, not only because constant repetition impresses a fact indelibly on the mind, but because the process of teaching itself gives deeper insight into the subject taught.
John Amos ComeniusLet the main object... to seek and to find a method of instruction, by which teachers may teach less, but learners learn more.
John Amos Comenius