If you be a lover of instruction, you will be well instructed.

To teach is to learn twice.

If all who are engaged in the profession of education were willing to state the facts instead of making greater promises than they can possibly fulfill, they would not be in such bad repute with the lay-public.

Of all our possessions, wisdom alone is immortal.

Spend your leisure time in cultivating an ear attentive to discourse, for in this way you will find that you learn with ease what others have found out with difficulty.

You never really know something until you teach it to someone else.