Debt is such a powerful tool, it is such a useful tool, it's much better than colonialism ever was because you can keep control without having an army, without having a whole administration.
Susan George

Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.
Arthur Conan Doyle

Diplomats are useful only in fair weather. As soon as it rains they drown in every drop.
Charles de Gaulle

Discrimination due to age is one of the great tragedies of modern life. The desire to work and be useful is what makes life worth living, and to be told your efforts are not needed because you are the wrong age is a crime.
Johnny Ball

Do I dare set forth here the most important, the most useful rule of all education? It is not to save time, but to squander it.
Jean-Jacques Rousseau

Don't commit to being a columnist unless you're willing to do it right. Report your behind off, so you have something original and useful to say. Say it in a way that will interest someone other than you, your family and your sources.
Allan Sloan

Each individual fact, taken by itself, can indeed arouse our curiosity or our astonishment, or be useful to us in its practical applications.
Hermann von Helmholtz

Early on, it's good to develop the ability to write. Learning to write is a useful exercise, even if what you're writing about is not that relevant.
Walter Gilbert

Economics is extremely useful as a form of employment for economists.
John Kenneth Galbraith

Education without values, as useful as it is, seems rather to make man a more clever devil.
C. S. Lewis

Even during my youth, I can recall very few black people living on any kind of public assistance. People were working, doing some kind of job that was useful to the community.
Ed Smith

Every combination of two or more human beings has both a useful aspect and a political aspect.
Robert Shea

Every hour of useful work is precious.
William Lyon Mackenzie King

For all right judgment of any man or things it is useful, nay, essential, to see his good qualities before pronouncing on his bad.
Thomas Carlyle

For at least another hundred years we must pretend to ourselves and to every one that fair is foul and foul is fair; for foul is useful and fair is not. Avarice and usury and precaution must be our gods for a little longer still.
John Maynard Keynes

For behaviorist films, that's been much more useful - the change of technology - but for my kind of films, doing them on film is much better, because it's more beautiful.
Michael Apted

For purposes of action nothing is more useful than narrowness of thought combined with energy of will.
Henri Frederic Amiel

For the future, I would suggest avoiding subjects of too vast a scale. It would be useful to make out a list of fundamental questions on the matter to be dealt with, and discuss only those.
Karl Lehmann

From the practical point of view, the susceptibility to infection of the guinea pig proved to be the most useful step forward. Today, all laboratories use this animal for preserving the virus.
Charles Jules Henry Nicole

Genre labels are useful only insofar as they help you find an audience.
Walter Jon Williams