Theravada Buddhism is a sect of Buddhism and is mainly spread in South Asia.

Mahayana Buddhism is a sect of Buddhism that emphasizes compassion and universal salvation.

He understands the meaning of the proverb 'Teaching is half learning', which means that teaching leads to one's own learning.

Sae acted coldly.

He chanted from the bottom of his heart.

He decided to change his character.

His existence is important to me.

He was abusing his power.

I went to the market accompanied by my mother.

If you rephrase that complex theory in simpler terms, it's just common sense.