The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
Henri Poincare

The thought grew strong in me that since I had gone to the trouble of being born, I might as well be useful in helping people live long and healthy lives. And this thought has always resided in the back of my mind.
Koichi Tanaka

The trust of the innocent is the liar's most useful tool.
Stephen King

The utmost thing is the user experience, to have the most useful experience.
Marissa Mayer

The various modes of worship which prevailed in the Roman world were all considered by the people as equally true; by the philosopher as equally false; and by the magistrate as equally useful.
Edward Gibbon

The word virtue is as useful to self-interest as the vices.
Francois de La Rochefoucauld

There are few ironclad rules of diplomacy but to one there is no exception. When an official reports that talks were useful, it can safely be concluded that nothing was accomplished.
John Kenneth Galbraith

There are few things more pleasing than the contemplation of order and useful arrangement.
Arthur Phillip

There are various sorts of curiosity; one is from interest, which makes us desire to know that which may be useful to us; and the other, from pride which comes from the wish to know what others are ignorant of.
Francois de La Rochefoucauld

There is no power on earth that can neutralize the influence of a high, simple and useful life.
Booker T. Washington

They made a shrewd guess that I could give them some useful information, and they were the first to meet me. Some one said they came to arrest me, and - well, let it go at that.
Joshua Slocum

This above all makes history useful and desirable; it unfolds before our eyes a glorious record of exemplary actions.
Titus Livius

To busy oneself with what is futile when one can do something useful, to attend to what is simple when one has the mettle to attempt what is difficult, is to strip talent of its dignity.
Jose Marti

To know ourselves, is agreed by all to be the most useful Learning; the first Lessons, therefore, given us ought to be on that Subject.
Eliza Haywood

To lose your temper is only useful once a year.
Colin R. Davis

To me, a painter, if not the most useful, is the least harmful member of our society.
Man Ray

To reach something good it is very useful to have gone astray, and thus acquire experience.
Saint Teresa of Avila

To read a book, to think it over, and to write out notes is a useful exercise; a book which will not repay some hard thought is not worth publishing.
Maria Mitchell

To think is of itself to be useful; it is always and in all cases a striving toward God.
Victor Hugo

To those who have chosen the profession of medicine, a knowledge of chemistry, and of some branches of natural history, and, indeed, of several other departments of science, affords useful assistance.
Charles Babbage