A certain number of Americans are already in Peking and most of us here feel that it would be very useful for the United States and especially for the Left-wing progressive movement in the United States if groups of students such as you mention could make a tour of China.
Anna Louise Strong

A good book, in the language of the book-sellers, is a salable one; in that of the curious, a scarce one; in that of men of sense, a useful and instructive one.
Oswald Chambers

A harmful truth is better than a useful lie.
Thomas Mann

A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.
George Bernard Shaw

A mind at liberty to reflect on its own observations, if it produce nothing useful to the world, seldom fails of entertainment to itself.
George Berkeley

A sense of duty is useful in work but offensive in personal relations. People wish to be liked, not to be endured with patient resignation.
Bertrand Russell

A slave has but one master; an ambitious man has as many masters as there are people who may be useful in bettering his position.
Jean de la Bruyere

Above all be of single aim; have a legitimate and useful purpose, and devote yourself unreservedly to it.
James Allen

Absence is one of the most useful ingredients of family life, and to dose it rightly is an art like any other.
Freya Stark

Acting has been very useful to me.
Jane Asher

Against my will, in the course of my travels, the belief that everything worth knowing was known at Cambridge gradually wore off. In this respect my travels were very useful to me.
Bertrand Russell

All these stories are grist to the mill of the government because they build up a very useful war psychosis.
Helen Suzman

Always desire to learn something useful.
Sophocles

Always think of what is useful and not what is beautiful. Beauty will come of its own accord.
Nikolai Gogol

An apology for the actions of some troops who, of course, are not representative of the majority of the armed forces here, I think that would have been useful and it would have helped to some extent.
Adnan Pachachi

An architect's most useful tools are an eraser at the drafting board, and a wrecking bar at the site.
Frank Lloyd Wright

And of course there's so much music in and around our family. I had a piano during Christmas because it's obviously useful through the season. There are so many people, songwriters, who are around.
Ashley Judd

Any place that anyone can learn something useful from someone with experience is an educational institution.
Al Capp

Any program is only as good as it is useful.
Linus Torvalds

Anyway, in my writing I've always been interested in finding places to stand, and I've found it very useful to have a direct experience of what I'm writing about.
Michael Pollan