Jeanne-Marie Bouvier de la Motte-Guyon (commonly known as Madame Guyon), was a French mystic and one of the key advocates of Quietism. Guyon believed that one should pray all the time, and that in whatever one does, one should be spending time with God. 'Prayer is the key of perfection and of sovereign happiness; it is the efficacious means of getting rid of all vices and of acquiring all virtues; for the way to become perfect is to live in the presence of God. He tells us this Himself: 'walk before me, and be thou perfect' Genesis 17:1. Prayer alone can bring you into His presence, and keep you there continually.' As she wrote in one of her poems: 'There was a period when I chose, A time and place for prayer ... But now I seek that constant prayer, In inward stillness known ...' Like St. Augustine, St. Thomas Aquinas, Calvin, and Martin Luther, she thought that a person's deliverance can only come from God as an outside source, never from within the person himself or herself.