He is a very careful person.

The late autumn wind is rustling the leaves of the trees.

His words were profound.

He was so profound that it was difficult for us to understand his thoughts.

He is thought to be a greedy person.

His actions are said to be deeply sinful.

Primitive communism is one of the initial forms of human social organization.

He likes to take a walk in the park at dusk.

The Calopteryx cornelia is a species endemic to Japan, and it has beautiful wings.

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