Page:Thoughts on art and life.djvu/184

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accomplished by the aforesaid bounds you will find that they equal the length of distance through which a similar objecft set in motion by an e q Ua l force would travel freely through the air.

15.

Every action must be caused by motion.

16.

Motion is the cause of all life.

17.

What is force? Force, I say, is a spiritual virtue, an invisible power, which by accidental exter- nal violence is caused by motion, and commun-cated and infused into bodies which are inert by nature, giving them an acftive life of marvellous power.

18.

What is force? I say that force is a spiritual, incorporate and invisible power, which for a brief duration is produced in bodies that by accidental violence are displaced from their natural state of inertia.

19. Force arises from dearth or abundance; it is the cchild of physical motion and the grandchild of spiritual motion, and the mother and origin of gravity. Gravity is confined to the elements of

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