Quaker Testimonies on the Plain Language Witness
Quaker Spirituality and the Use of Plain Speech
Elizabeth Gurney Fry, Quaker humanitarian (1780-1845)
I used to think and do now how little dress matters. But I find it almost impossible to keep to the principles of Friends without altering my dress and speech. . . . They appear to me a sort of protector to the principles of Christianity in the present state of the world.
ALL Friends, Take heed of running on in a Form, lest ye do lose the Power; but keep in the Power and Seed of God, in which ye will live in the Substance. And at any Disputes, take heed: many may be lifted up in the Victory and Conquest, and after have a Joy in the Prophecies and Openings, and after fall. And if Bablers come, and Janglers say, They have a bad Meeting; and so, the murmuring Nature getteth up, out of Patience, and the Seed, which beareth all things and suffereth all things, which keepeth down that, ...
I am not Amish or Mennonite, but some people who come to my website are interested in knowing more about these groups. I can recommend these books as authoritative and relatively inexpensive sources of further information.