He decided to apply euthanasia to his sick dog.

She decided to have a hysterectomy.

A demonstration of dissection was conducted in the medical class.

He used the teleportation technique to escape from the enemy.

He decided to have a vasectomy.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.