Our understanding of the four basic concepts of Physics -- space, time, matter and force -- has undergone radical change in the course of work on unification, starting with Maxwell's unification of electricity with magnetism, all the way to present day string theory. What started as four independent concepts, with space and time postulated and the possible forms of matter and force arbitrarily chosen, now appear as different aspects of a rich and novel dynamically determined structure.
Peter FreundRelated topics
appear basic change course day different force four magnetism matter novel now possible present rich space string understanding unification way workRelated quotes
Now a writer can make himself a nice career while he is alive by espousing a political cause, working for it, making a profession of believing in it, and if it wins he will be very well placed. All politics is a matter of working hard without reward, or with a living wage for a time, in the hope of booty later. A man can be a Fascist or a Communist and if his outfit gets in he can get to be an ambassador or have a million copies of his books printed by the Government or any of the other rewards the boys dream about.
Ernest Hemingway
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time someting like that happened in politics or religion.
Carl Sagan
Of the various executive abilities, no one excited more anxious concern than that of placing the interests of our fellow-citizens in the hands of honest men, with understanding sufficient for their stations. No duty is at the same time more difficult to fulfil. The knowledge of character possessed by a single individual is of necessity limited. To seek out the best through the whole Union, we must resort to the information which from the best of men, acting disinterestedly and with the purest motives, is sometimes incorrect.
Thomas Jefferson
Now, if the principle of toleration were once admitted into classical education --if it were admitted that the great object is to read and enjoy a language, and the stress of the teaching were placed on the few things absolutely essential to this result, if the tortoise were allowed time to creep, and the bird permitted to fly, and the fish to swim, towards the enchanted and divine sources of Helicon --all might in their own way arrive there, and rejoice in its flowers, its beauty, and its coolness.
Harriet Beecher Stowe
Conditions to the north of us, in the Voronezh and Steppe Fronts zone of action, and our offensive on Kharkov demands that we not lose time and we commit all forces so that we can draw off as many divisions as possible from Kharkov. And even if we do not draw them off, at least we will not give Manstein the ability to take any of his units from our part of the front. If we attract one or two German tank divisions - it will be the best contribution to the defeat of the enemy in the south.
Aleksandr Vasilevsky