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These two sentences refer to the same field.

It refers to meditation

You should be down-to-earth, keep your thoughts alive, be single-minded and quiet, and you will see a bright spot, which is like the "dragon raises pearls" in Buddhism.

Single-minded and quiet, meticulous to the limit,

Metaphorically, it's like an old hen holding an egg. When the egg matures, she will gain supreme wisdom. She can see the operation of everything and the cycle of things with her wisdom and heart without leaving home.