Many people do not allow their principles to take root, but pull them up every now and then, as children do the flowers they have planted, to see if they are growing.
Men are four;
He who knows and knows not that he knows. He is asleep; wake him.
He who knows not and knows not that he knows not. He is a fool; shun him.
He who knows not and knows that he knows not. He is a child; teach him.
He who knows and knows that he knows. He is a king; follow him.
The heights by great men reached and kept
Were not attained by sudden flight,
But they, while their companions slept,
Were toiling upward in the night.