Clothing defends our bodies against the cold and protects our bodies against the heat. It also hugs or adorns our bodies. It is preached in the “Medicine King” chapter of the Lotus Sūtra, fascicle 7, “It is as if a naked person was given clothing.” This means that it is tantamount to a person who receives clothes after shivering in the cold without them. It refers to a happy mind.
Nanjō-dono Gohenji, Reply to Lord Nanjō, Writings of Nichiren Shōnin, Volume 7, Followers II, Pages 17