Always when you are about to say anything, first weigh it in your mind; for with many the tongue outruns the thought.

It is more important to know where you are going than to get there quickly. Do not mistake activity for achievement. Remember that there is nothing stable in human affairs, therefore avoid undue elation in prosperity or undue depression in adversity.

Whetstones are not themselves able to cut, but make iron sharp and capable of cutting.

Regard as your most faithful friends, not those who praise everything you say or do, but those who criticize your mistakes.

Consider that nothing in human life is stable; for then you will not exult overmuch in prosperity, nor grieve overmuch in adversity. Rejoice over the good things which come to you, but grieve in moderation over the evils which befall you.

Be gracious to all men, but choose the best to be your friends.

Of all our possessions, wisdom alone is immortal.