It means that capable people want to forget the world and indulge in heaven by relying on their surroundings, which means small seclusion.
People who are really capable hide in the street, crouching tiger, which means hiding in the middle.
The ruling and opposition parties will only hide top talents. Although they are in the noisy current politics, they can be ignorant and indifferent. This is the real hermit.
As for the source, I only know that it was circulated by the people in the Wei and Jin Dynasties, but I don't think it came from that book! If there is, it may be after Wei and Jin Dynasties, hehe.
It's probably a proverb, which has existed since ancient times, so it's not easy to find out who said it first. But in the vernacular sense, I think it may be the poem "Zhong Yin" written by Bai Juyi, a poet in the Tang Dynasty, which was summarized in an easy-to-understand way for the first time.
You can read it:
Bai Juyi's alto
The great hermit lives in the city, and the little hermit fans in Shan Ye.
Autumn sails are too cold and the market is too noisy.
It is better to hide in the middle and stay in the company.
It seems out of place, neither busy nor idle.
Only one of them is lucky and safe.