“The total quantity of all the forces capable of work in the whole universe remains eternal and unchanged throughout all their changes. All change in nature amounts to this, that force can change its form and locality, without its quantity being changed. The universe possesses, once for all, a store of force which is not altered by any change of phenomena, can neither be increased nor diminished, and which maintains any change which takes place on it.”
![“Geometry, which should only obey Physics, when united with it sometimes commands it. If it happens that the question which we wish to examine is too complicated for all the elements to be able to enter into the analytical comparison we wish to make, we separate the more inconvenient [elements], we…” quote by Jean le Rond d'Alembert](https://sms4smile.com/quotes/img-quotes/0d9/jean-le-rond-d-alembert-26487_able_geometry-which-should-only-obey-physics_6945.jpg)
![“[New York] is a city largely based on great skyscrapers, and they will always be the essence of New York. That won't change, just as the character of the people who live here will not be altered by this tragedy.” quote by Donald Trump](https://sms4smile.com/quotes/img-quotes/4ee/donald-trump-18_altered_new-york-is-a-city-largely-based-on-grea_56730.jpg)
