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The difficulty, as in all this work, is to find a notation which is both concise and intelligible to at least two people of whom one may be the author.
--
with Abdus Salam. (October 1951). "The Renormalization of Meson Theories". Reviews of Modern Physics 23 (4): 311-314. About the difficulty to express renormalization in quantum field theories. Also known as the Salam criterion.

 

Paul Taunton Matthews

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It is important to distinguish the difficulty of describing and learning a piece of notation from the difficulty of mastering its implications. [...] Indeed, the very suggestiveness of a notation may make it seem harder to learn because of the many properties it suggests for exploration.

 

Kenneth E. Iverson

 

I was appalled to find that the mathematical notation on which I had been raised failed to fill the needs of the courses I was assigned, and I began work on extensions to notation that might serve. In particular, I adopted the matrix algebra used in my thesis work, the systematic use of matrices and higher-dimensional arrays (almost) learned in a course in Tensor Analysis rashly taken in my third year at Queen’s, and (eventually) the notion of Operators in the sense introduced by Heaviside in his treatment of Maxwell’s equations.

 

Kenneth E. Iverson

 

I have never admitted the right of an elderly author to alter the work of a young author, even when the young author happens to be his former self. In the case of a work which is a mere exhibition of skill in conventional art, there may be some excuse for the delusion that the longer the artist works on it the nearer he will bring it to perfection. Yet even the victims of this delusion must see that there is an age limit to the process, and that though a man of forty-five may improve the workmanship of a man of thirty-five, it does not follow that a man of fifty-five can do the same.
When we come to creative art, to the living word of a man delivering a message to his own time, it is clear that any attempt to alter this later on is simply fraud and forgery. As I read the old Quintessence of Ibsenism I may find things that I see now at a different angle, or correlate with so many things then unnoted by me that they take on a different aspect. But though this may be a reason for writing another book, it is not a reason for altering an existing one.

 

George Bernard Shaw

 

Though we travel the world over to find the beautiful, we must carry it with us, or we find it not. The best of beauty is a finer charm than skill in surfaces, in outlines, or rules of art can ever teach, namely, a radiation from the work of art of human character, — a wonderful expression through stone, or canvas, or musical sound, of the deepest and simplest attributes of our nature, and therefore most intelligible at last to those souls which have these attributes.

 

Ralph Waldo Emerson

 

His philosophy of Satyagraha is both a personal and a social struggle to realize the Truth, which he identifies as God, the Absolute Morality. He seeks this Truth, not in isolation, self-centeredly, but with the people. He said, "I want to find God, and because I want to find God, I have to find God along with other people. I don't believe I can find God alone. If I did, I would be running to the Himalayas to find God in some cave there. But since I believe that nobody can find God alone, I have to work with people. I have to take them with me. Alone I can't come to Him."

 

Nelson Mandela