I could, however, select from the crowd no one whose opinions seemed worthy of preference, and thus I found myself constrained, as it were, to use my own Reason in the conduct of my life.
To activate or, in effect, to “perceive” the meaning of a holograph, energy (in this case, a coherent light source such as a laser beam) must be passed through the interference pattern generated by interaction between the moving energy and the energy at rest.