It is necessary to keep one's compass in one's eyes and not in the hand, for the hands execute, but the eye judges.
Michelangelo

Divide each difficulty into as many parts as is feasible and necessary to resolve it.
Rene Descartes

If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.
Rene Descartes

Before a man speaks it is always safe to assume that he is a fool. After he speaks, it is seldom necessary to assume it.
H. L. Mencken

To become an able and successful man in any profession, three things are necessary, nature, study and practice.
Henry Ward Beecher

A man who suffers before it is necessary, suffers more than is necessary.
Lucius Annaeus Seneca

It is not necessary to change. Survival is not mandatory.
W. Edwards Deming

Cultivation to the mind is as necessary as food to the body.
Marcus Tullius Cicero

Death is not natural for a state as it is for a human being, for whom death is not only necessary, but frequently even desirable.
Marcus Tullius Cicero

The first resistance to social change is to say it's not necessary.
Gloria Steinem

But it is also clear that left entirely untouched by public policy, the capitalist system will produce more inequality than is socially healthy or than is necessary for maximum efficiency.
Barney Frank

It isn't necessary to imagine the world ending in fire or ice. There are two other possibilities: one is paperwork, and the other is nostalgia.
Frank Zappa

Don't lower your expectations to meet your performance. Raise your level of performance to meet your expectations. Expect the best of yourself, and then do what is necessary to make it a reality.
Ralph Marston

Where there is the necessary technical skill to move mountains, there is no need for the faith that moves mountains.
Eric Hoffer

Men like me are impossible until the day when they become necessary.
Victor Hugo

It is often necessary to know how to obey a woman in order sometimes to have the right to command her.
Victor Hugo

Religions do a useful thing: they narrow God to the limits of man. Philosophy replies by doing a necessary thing: it elevates man to the plane of God.
Victor Hugo

To be perfectly happy it does not suffice to possess happiness, it is necessary to have deserved it.
Victor Hugo

An audience is always warming but it must never be necessary to your work.
Gertrude Stein

A study of the history of opinion is a necessary preliminary to the emancipation of the mind.
John Maynard Keynes