In that context, I can understand his remarks.

The Andes is the longest mountain range in the world, located in South America.

He was hiding in a cave in the mountain.

He injured his knee.

He injured his knee joint.

He is a very quiet person.

I like watching the stars on a quiet night.

The stillness of this park calms the mind.

I like watching stars in the still night.

In Buddhism, 'Sei' means the tranquility of the mind.