F. J. Nicholson: Quakers and the Arts, chap 2

F. J. Nicholson: Quakers and the Arts, chap 2: "In the vocabulary of the first Friends the key-word was Simplicity. Simplicity (sine plexus), without folds, complexities; the core of religious faith and practice was stripped of all that was considered inessential. The simplicity of Truth was found by breaking off the accretions of creeds and removing the weary load of "

Some people might confuse simplicity with emptyness or nothing. This is far from the truth.