That is the only substance we are confident of in dynamics.
"The Approach to Philosophy"
Ralph Barton Perry
He accepts the order of nature formulated in the Newtonian dynamics, and the moral order acknowledged in the common human conviction of duty.
"The Approach to Philosophy"
Ralph Barton Perry
Similarly, the theory of the evolution of the planetary system, in that it requires the assumption of particular distances and particular masses for the parts of the primeval nebula, is more arbitrary than rational dynamics.
"The Approach to Philosophy"
Ralph Barton Perry