Marcus Tullius Cicero

Through ignorance of what is good and what is bad, the life of men is greatly perplexed.

Reason should direct, and appetite obey.

Everything is alive... Everything is interconnected.

Whatever you do, do with all your might.

Since an intelligence common to us all makes things known to us and formulates them in our minds, honorable actions are ascribed by us to virtue, and dishonorable actions to vice; and only a madman would conclude that these judgments are matters of opinion, and not fixed by nature.

In a disordered mind, as in a disordered body, soundness of health is impossible.

For there is assuredly nothing dearer to a man than wisdom, and though age takes away all else, it undoubtedly brings us that.

The mansion should not be graced by its master, the master should grace the mansion.

The Intellect engages us in the pursuit of Truth. The Passions impel us to Action.

The cultivation of the mind is a kind of food supplied for the soul of man.

Mathematics is an obscure field, an abstruse science, complicated and exact; yet so many have attained perfection in it that we might conclude almost anyone who seriously applied himself would achieve a measure of success.

Philosophy is true mother of the arts [of science].

Not to know what has been transacted in former times is to be always a child. If no use is made of the labors of past ages, the world must remain always in the infancy of knowledge.

It is the character of a brave and resolute man not to be ruffled by adversity and not to desert his post.

Promises are not to be kept, if the keeping of them is to prove harmful to those to whom you have made them.

I prefer the most unfair peace to the most righteous war.

Our character is not so much the product of race and heredity as of those circumstances by which nature forms our habits, by which we are nurtured and live.

I never heard of an old man forgetting where he had buried his money. Old people remember what interests them: the dates fixed for their lawsuits, and the names of their debtors and creditors.

If you pursue good with labor, the labor passes away but the good remains; if you pursue evil with pleasure, the pleasure passes away and the evil remains.

To know the laws is not to memorize their letter but to grasp their full force and meaning.

The eyes like sentinel occupy the highest place in the body.