Lao Zi believes that the highest state of health is to reach adulthood and return to the pure state of infancy. This is what Laozi's Tao Te Ching calls "returning to the infant".

Lao Zi's "Tao Te Ching" says: "A man of virtue is thicker than a red child. Poisonous insects do not sting, and ferocious beasts are not based on it."

Lao Zi

The meaning of this statement is that a person with thick and complete morality is like a baby; poisonous insects will not sting him, fierce beasts will not hurt him, and no one will harm him.

Lao Zi said, "The way to nourish life is to have a quiet spirit and a clear mind. The way to nourish life is to have a quiet mind and a clear heart. The dirt of the heart is the desire for material things and the desire for knowledge."

The general idea of Lao Tzu's passage is that the heart can only be well nourished if it is clear. In order to be completely pure in the heart, one must achieve the absence of the desire to pursue material gain and the absence of the desire to pursue knowledge and learning.

The desire to pursue material gain and knowledge will bring happiness when one succeeds and anxiety when one fails. And the higher the goal to pursue, the more energy will be spent. The pursuit of the process is also often more bitter and less happy, these are not good for health.

The Tao Te Ching

But for the average person, as long as there is something they don't understand, they will naturally want to study it to understand it. Therefore, in order to achieve a state where there is no desire in the heart to pursue knowledge and learning, one must study and understand all the truths in the world before one can stop thinking and studying.

That is to say, only those who have studied and understood all the truths of life with great wisdom can stop studying knowledge and learning.

When a person has thoroughly studied and understood the truth of how to do business, he will no longer want to do business, and will no longer pursue fame, fortune, and status. At this point, one reaches what Laozi called "Wu Wei", that is, one no longer has to do anything.

To have no desire to pursue knowledge and learning inwardly, and no desire to pursue fame and fortune outwardly, is to have reached the highest state of health, which is also the perfect state of life.

The state of a human being at this point is similar to that of a baby, and at this point he has reached what Laozi's Tao Te Ching says, "Returning to a baby".

Babies

Babies are so innocent that they have no desire for fame, fortune or knowledge, so everyone loves them, and neither poisonous worms nor fierce beasts harm them, and no one wants to harm them.

Because the baby does not want to hurt others, no one wants to hurt it either. The great wise one who no longer seeks fame and learning has attained innocence like an infant, and so is not harmed by poisonous insects and fierce beasts either.