4. But I have heard that he who is skilful in managing the life entrusted to him for a time travels on the land without having to shun rhinoceros or tiger, and enters a host without having to avoid buff coat or sharp weapon. The rhinoceros finds no place in him into which to thrust its horn, nor the tiger a place in which to fix its claws, nor the weapon a place to admit its point. And for what reason? Because there is in him no place of death.

51. 1. All things are produced by the Tao, and nourished by its outflowing operation. They receive their forms according to the nature of each, and are completed according to the circumstances of their condition. Therefore all things without exception honour the Tao, and exalt its outflowing operation.

2. This honouring of the Tao and exalting of its operation is not the result of any ordination, but always a spontaneous tribute.

3. Thus it is that the Tao produces (all things), nourishes them, brings them to their full growth, nurses them, completes them, matures them, maintains them, and overspreads them.

4. It produces them and makes no claim to the possession of them; it carries them through their processes and does not vaunt its ability in doing so; it brings them to maturity and exercises no control over them;—this is called its mysterious operation.

52. 1. (The Tao) which originated all under the sky is to be considered as the mother of them all.

2. When the mother is found, we know what her children should be. When one knows that he is his mother's child, and proceeds to guard (the qualities of) the mother that belong to him, to the end of his life he will be free from all peril.

3. Let him keep his mouth closed, and shut up the portals (of his nostrils), and all his life he will be exempt from laborious exertion. Let him keep his mouth open, and (spend his breath) in the promotion of his affairs, and all his life there will be no safety for him.

4. The perception of what is small is (the secret of) clear-sightedness; the guarding of what is soft and tender is (the secret of) strength.

5.