In Walden what does Harry David thoreau state is more important to own than clothing

Thoreau states that your own thoughts are more important to own than clothing.

From "Walden"

"Sell your clothes and keep your thoughts. God will see that you do not want society."

"Walden" is a book written by Henry David Thoreau. The text is a reflection upon simple living in natural surroundings. The work is part personal declaration of independence, social experiment, voyage of spiritual discovery, satire, and a manual for self-reliance.