The Hills knew nothing about medicine and did not understand what the Needle of Fire meant.

It was an extremely advanced and sophisticated acupuncture art.

The human body comprises Yin and Yang energy.

The body would be healthy only when they were in balance.

If there was an abundance of Yin energy or vice versa, one would fall sick.

The Needle of Fire was an acupuncture art that decreased the Yin and increased the Yang.

Though Yitzchak had seen such art in classical medical books, h