Where force is necessary, one should make use of it boldly, resolutely — Force

"There are many changes in what concepts are important when we go from classical to quantum mechanics. ... In particular, the force concept gradually fades away, while the concepts of energy and momentum become of paramount importance. You remember that instead of particle motions, one deals with probability amplitudes which vary in space and time. In these amplitudes there are wavelengths related to momenta, and frequencies related to energies. The momenta and energies, which determine the phases of wave functions, are therefore the important quantities in quantum mechanics. Instead of forces, we deal with the way interactions change the wavelength of the waves. The idea of a force becomes quite secondary—if it is there at all. When people talk about nuclear forces, for example, what they usually analyze and work with are the energies of interaction of two nucleons, and not the force between them. Nobody ever differentiates the energy to find out what the force looks like."

"The laws of motion of visible and tangible, or molar, matter had been worked out to a great degree of refinement and embodied in the branches of science known as Mechanics, Hydrostatics, and Pneumatics. These laws had been shown to hold good... throughout the universe on the assumption that all such masses of matter possessed inertia and were susceptible of acquiring motion, in two ways, firstly by impact, or impulse from without; and, secondly, by the operation of certain hypothetical causes of motion termed forces, which were usually supposed to be resident in the particles of the masses themselves, and to operate at a distance, in such a way as to tend to draw any two such masses together, or to separate them more widely."

"The wish to hurt, the momentary intoxication with pain, is the loophole through which the pervert climbs into the minds of ordinary men."

"The danger is becoming greater. As the arsenals of the superpowers grow in size and sophistication and as other governments—perhaps even, in the future, dozens of governments—acquire these weapons, it may be only a matter of time before madness, desperation, greed or miscalculation lets loose the terrible force."

"The use of force alone is but temporary. It may subdue for a moment; but it does not remove the necessity of subduing again; and a nation is not governed, which is perpetually to be conquered."

"Power is not a star war but a war of hawks If you want to overcome any predatory animal you must hold on to your strength relax your fertility and act completely normally If you feel fear on your face you will become prey."