Quakers (Stanford Encyclopedia of Philosophy)
Stanford Encyclopedia entry on the Religious Society of Friends, covering the Inner Light doctrine, silent worship, and Quaker philosophy.
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A Testament of Devotion
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Pendle Hill Pamphlets
Long-running series of short essays on Quaker spirituality, contemplative practice, and social witness from the Pendle Hill retreat center.
Quaker Heritage Press
Free digital archive of classic Quaker texts including journals, epistles, and theological works from the 17th century onward.
Quaker Spirituality: Selected Writings
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A collection of essential Quaker writings spanning four centuries, exploring the tradition of silent worship and the experience of the Inner Light.
The Journal of George Fox
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The spiritual autobiography of Quakerism's founder, recording his discovery of the Inner Light and the birth of the Religious Society of Friends.