Anger, if not restrained, is frequently more hurtful to us than the injury that provokes it.

My joy in learning is partly that it enables me to teach.

The greatest wealth is a poverty of desires.

How many discoveries are reserved for the ages to come when our memory shall be no more, for this world of ours contains matter for investigation for all generations.

We must take care to live not merely a long life, but a full one; for living a long life requires only good fortune, but living a full life requires character. Long is the life that is fully lived; it is fulfilled only when the mind supplies its own good qualities and empowers itself from within.

How can a thing possibly govern others when it cannot be governed itself?

Study rather to fill your mind than your coffers; knowing that gold and silver were originally mingled with dirt, until avarice or ambition parted them.