For all my years in public life, I have believed that America must sail toward the shores of liberty and justice for all. There is no end to that journey, only the next great voyage. We know the future will outlast all of us, but I believe that all of us will live on in the future we make.
Edward Kennedy

We must use time wisely and forever realize that the time is always ripe to do right.
Nelson Mandela

We must be our own before we can be another's.
Ralph Waldo Emerson

Though we travel the world over to find the beautiful, we must carry it with us or we find it not.
Ralph Waldo Emerson

Good men must not obey the laws too well.
Ralph Waldo Emerson

One must be an inventor to read well. There is then creative reading as well as creative writing.
Ralph Waldo Emerson

Every actual State is corrupt. Good men must not obey laws too well.
Ralph Waldo Emerson

Before we acquire great power we must acquire wisdom to use it well.
Ralph Waldo Emerson

Each age, it is found, must write its own books; or rather, each generation for the next succeeding.
Ralph Waldo Emerson

Pictures must not be too picturesque.
Ralph Waldo Emerson

If you would lift me up you must be on higher ground.
Ralph Waldo Emerson

Truth is handsomer than the affectation of love. Your goodness must have some edge to it, else it is none.
Ralph Waldo Emerson

Every mind must make its choice between truth and repose. It cannot have both.
Ralph Waldo Emerson

He who is to be a good ruler must have first been ruled.
Aristotle

A tyrant must put on the appearance of uncommon devotion to religion. Subjects are less apprehensive of illegal treatment from a ruler whom they consider god-fearing and pious. On the other hand, they do less easily move against him, believing that he has the gods on his side.
Aristotle

He who is unable to live in society, or who has no need because he is sufficient for himself, must be either a beast or a god.
Aristotle

In making a speech one must study three points: first, the means of producing persuasion; second, the language; third the proper arrangement of the various parts of the speech.
Aristotle

We must no more ask whether the soul and body are one than ask whether the wax and the figure impressed on it are one.
Aristotle

Therefore, the good of man must be the end of the science of politics.
Aristotle

Not only must we be good, but we must also be good for something.
Henry David Thoreau