721. I cannot better compare these reflections than with the reflections of man himself upon himself. He does not know that his hands or face are cold, or that his foot presses the ground when he walks, nor that he is uttering words when he speaks, or in like manner whatever else exists anywhere in the body, unless he reflects upon it, and directs his thought to it. There are many similar confirming things, as that, if man does not reflect on the sound of bells, or on the objects seen about him, he is altogether ignorant that he has heard or seen them. 1748, Feb. 10.