Although I personally do not belong to this or any religious organization, I sympathize with Quaker ideals, respect the Quaker ethos, and admire the Quaker individual. But although the Quaker form of worship is quite lofty from the religious standpoint, it is not lofty enough from the mystical one. Its silent meditation is good, but its congregational meditation cannot attain the profound depth possible in private and solitary meditation. Moreover, its expression in uttered speech of what "the holy spirit moves us to say," although helpful from a religious standpoint, is a hindrance from the mystical one. For it disturbs the individual concentration.
A community which has always been told by its rules that the corporate form of worship is the primary and necessary one cannot leap suddenly into the blinding glare of full truth. It has to travel first from the quarter-truth to the half-truth, and so on. The Quaker method of group meditation is such an advance. It represents a loftier view of the meaning of worship because it shifts the emphasis from outward sacrament to inward holiness, from swallowed creed to quiet "waiting on the Lord." But from the true mystical standpoint, this group form is only a concession to traditional human habit and gregarious human weakness. Nevertheless, if anyone feels that membership of a religious body is essential to him, then I would recommend him to join the Society of Friends, or Quakers, as they are more popularly called. Not that I am satisfied with all their doctrines and methods, but that I consider there is more honesty and more safety amongst them, less exploitation and less insincerity than amongst any other religious denomination I know. That there is no paid class of professional clergy in the Society of Friends is undoubtedly one of the factors which contribute to this purity.
-- Notebooks Category 17: The Religious Urge > Chapter 5 : Comments On Specific Religions > # 108