William Penn (1644–1718) was a politician, a courtier, a theologian, a prolific writer and the founder of the colony of Pennsylvania. In 1693 he wrote:

The humble, meek, merciful, just, pious, and devout souls are everywhere of one religion; and when death has taken off the mask they will know one another, though the divers liveries they wear here makes them strangers. This world is a form; our bodies are forms; and no visible acts of devotion can be without forms. But yet the less form in religion the better, since God is a Spirit; for the more mental our worship, the more adequate to the nature of God; the more silent, the more suitable to the language of a Spirit.