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If heat were the affecting force, direct indications of its presence could be found which would not make use of geometry as an indirect method. ...direct evidence for the presence of heat is based on the fact that it affects different materials in different ways. ...The forces... which we have introduced... have two properties: (a) They affect all materials in the same way. (b) There are no insulating [or isolating] walls. ...the definition of the insulating wall may be added here: it is a covering made of any kind of material which does not act upon the enclosed object with forces having property a. Let us call the forces which have the properties a and b universal forces; all other forces are called differential forces. Then it can be said that differential forces, but not universal forces, are directly demonstrable.

 

Hans Reichenbach

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The non-violent Negro is seeking to create the beloved community. He directs his attack on the forces of evil rather than on individuals. The tensions are not between the races, but between the forces of justice and injustice; between the forces of light and darkness.

 

Martin Luther King

 

Prayer is decisive element of victory. Wars are won by those who have managed to attract from elsewhere, from the skies, the mysterious forces of the invisible world and to secure their support. These mysterious forces are the souls of the dead, the souls of our ancestors, who once were, like us, linked to our clods, to our furrows, who died for the defense of this land and are still linked today to it by the memory of their lives and by us, their sons, their grandsons, their great grandsons. But, above the souls of the dead, there is God. Once these forces are attracted, they are of considerable power, they defend us, they give us courage, will, all the elements necessary to victory and which make us win. They bring in panic and terror among the enemies, paralyse their activity. In the last analysis, victories do not depend only on material preparation, on the material forces of the belligerents, but on their power to secure the support of spiritual forces. The fairness and the morality of actions and the fervent, insistent call for them in the form of rite and collective prayer attract such forces.

 

Corneliu Zelea Codreanu

 

Gravitational force is simple, and a thing by itself, as also are electric and magnetic forces as long as the electric and magnetic poles stand at rest. But as soon as motion comes into the picture, the whole situation is changed. Forces of new kinds come into play, for moving electric charges exert magnetic forces in addition to the electric forces they exert when at rest, while moving magnets exert electric forces in addition to the magnetic forces they exert while at rest. When the exact laws governing these intricate laws had been discovered by a great number of experimenters, Clerk Maxwell succeeded in expressing them in a mathematical form which was both simple and elegant.

 

James Jeans

 

I have spoken of the forces of which judges avowedly avail to shape the form and content of their judgments. Even these forces are seldom fully in consciousness. They lie so near the surface, however, that their existence and influence are not likely to be disclaimed. But the subject is not exhausted with the recognition of their power. Deep below consciousness are other forces, the likes and the dislikes, the predilections and the prejudices, the complex of instincts and emotions and habits and convictions, which make the man, whether he be litigant or judge.

 

Benjamin N. Cardozo

 

Our design, not respecting arts, but philosophy, and our subject, not manual, but natural powers, we consider chiefly those things which relate to gravity, levity, elastic force, the resistance of fluids, and the like forces, whether attractive or impulsive; and therefore we offer this work as mathematical principles of philosophy; for all the difficulty of philosophy seems to consist in this — from the phenomena of motions to investigate the forces of nature, and then from these forces to demonstrate the other phenomena...

 

Isaac Newton