The examination of what is agreeable and what disagrceable is one's own self, yields benefit. The progress in life of a man who is devoid of the perception of truth is like that of a man who rashly journey on a long road unseen before. The progress, however, of those who are gifted with intelligence, is like that of men who journey along the same road, riding on a car to which are yoked (fleet) horses and which moves with swiftness. Having ascended to the top of a mountain, one should not cast his eyes on the surface of the earth.