As in water face answereth to face - All men's hearts are pretty nearly alike; water is not more like to water, than one heart is to another. Or, as a man sees his face perfectly reflected by the water, when looking into it; so the wise and penetrating man sees generally what is in the heart of another by considering the general tenor of his words and actions.
"Surely, if each man saw another's heart
There would be no commerce; All would disperse, And live apart."
Hebert.
As we see our own face when we look on the mirror-like surface of the water, so in every heart of man we may see our own likeness. In spite of all diversities we come upon the common human nature in which we all alike share. Others see in the reference to the reflection in the water the thought that we judge of others by ourselves, find them faithful or the reverse, as we ourselves are.