The learned man knows that he is ignorant.

The animal is ignorant of the fact that he knows. The man is aware of the fact that he is ignorant.

The man who does not know other languages, unless he is a man of genius, necessarily has deficiencies in his ideas.

Is there no hope? the sick man said, The silent doctor shook his head, And took his leave with signs of sorrow, Despairing of his fee to-morrow.

Whenever we encounter the Infinite in man, however imperfectly understood, we treat it with respect. Whether in the synagogue, the mosque, the pagoda, or the wigwam, there is a hideous aspect which we execrate and a sublime aspect which we venerate. So great a subject for spiritual contemplation, such measureless dreaming -- the echo of God on the human wall!

The wise man does not grow old, but ripens.