Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.


The Evolution of Physics - One Clew Remains (p. 31), Simon & Schuster. 1961


Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.

Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.

Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.

Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.