He decided to run a marathon to test his limits.

This solemn atmosphere reminds us of how important a task we are undertaking.

This grave atmosphere reminds us of how important a place we are in.

Glycogen is the main way our body stores energy.

He started hearing auditory hallucinations from stress.

It is important to calculate the subtrahend accurately.

This way of thinking limits our perspective.

The commoners were envious of the royal family's lifestyle.

He had hallucinations because of his illness.

I felt a deep disillusionment because of his actions.