How to explain Zhouyi's "straightness, square and greatness, no learning and no disadvantages?"

This is Kun Gua: "Straight, square and big; There is no harm in not learning. " The intuition of the earth is thick, square and vast expanse. Although people are not familiar with the structure of the earth, they will not encounter any problems. "

Straightness, intuition and falsehood are qualities, and training is the key. Square, square. There is an ancient legend that the sky is round and the place is round. At that time, people had an intuition about the earth. Extensive training. Familiar. All, double negation, affirmation.

The hexagrams in Kun mainly talk about people's intuitive feelings and preliminary understanding of the earth.