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" Actually, I was more or less determined to be a theoretical physicist at the age of thirteen. "
" In order to achieve a true understanding of string theory, some new idea will be required, and most likely, some break with the concepts on which we've traditionally based physical theory. "
" The early 1960s, when I started my graduate studies at UC Berkeley, were a period of experimental supremacy and theoretical impotence. "
" In the lab, we could not see or physically describe the mathematical objects that we called quarks, which we suspected were the key to unlocking the dynamics of the strong force that binds together the clump of protons and neutrons at the center of the atom. "
" Theorists have wonderful ideas which take years and years to be verified. "
" Theorists can be wrong; only nature is always right. "
" The main reason why people should care about research in fundamental physics is the same reason they care about astronomy and cosmology. People, children, want to know what we're made out of, how it works, and why the universe is the way it is. "
" Some wonder whether some day we will arrive at a theory of everything and run out of new problems to solve - much as the effort to explore the earth ran out of new continents to explore. "
" From the age of 13, I was attracted to physics and mathematics. My interest in these subjects derived mostly from popular science books that I read avidly. "
" To understand the universe in the state that it began in, the so-called Big Bang, we need laws of physics that work better than our current set of rules and procedures, which break down when we try to push them back to the beginning. "
" The progress of science is much more muddled than is depicted in most history books. This is especially true of theoretical physics, partly because history is written by the victorious. "
" I was born in Washington, D.C., on February 19, 1941, the eldest of four sons. "
" Since the founding of quantum mechanics in the 1920s, theoretical physics had nurtured an extremely radical tradition. "
" The advice I tell students is to think about the big problems. I mean, work on anything you can work on where you can make progress. But always keep in mind the big problems. "
" When I was at Berkeley, the framework of quantum field theory could calculate the dynamics of electromagnetism. It could roughly describe the motion of the weak nuclear force, radiation. But it hit a brick wall with the strong interaction, the binding force. "
" I strongly believe that the fundamental laws of nature are not emergent phenomena. "
" My father and mother treated us children as intellectual equals, thus greatly bolstering our self-confidence and our interest in ideas of all kinds. "
" Quantum field theory was originally developed for the treatment of electrodynamics, immediately after the completion of quantum mechanics and the discovery of the Dirac equation. "
" I had set out to disprove quantum field theory - and the opposite occurred! I was shocked. "
" The Big Bang theory is the idea that if we go back early enough in the history of the universe - and we can do this, of course, by looking at starlight coming to us from billions of years ago - we will see a very hot and dense period where the universe was much smaller, denser, and hotter. "
" Fortunately, nature is as generous with its problems as Nobel with his fortune. The more we know, the more aware we are of what we know not. "
" Indeed, the most important product of knowledge is ignorance. "
" Reading history, one rarely gets the feeling of the true nature of scientific development, in which the element of farce is as great as the element of triumph. "