The Quaker Faith
At the very centre of the Quaker faith lies the concept of the Inner Light. This principle states that in every human soul there is implanted a certain element of Gods own Spirit and divine energy. This element, known to early Friends as that of God in everyone, the seed of Christ, or the seed of Light, means to Friends, in the words of John 1:9, the true Light, which lighteth every man that cometh into the world.
Friends generally believe that first-hand knowledge of God is only possible through that which is experienced, or inwardly revealed to the individual human being through the working of Gods quickening Spirit. This explains the attitude of Friends towards many things, including the person and ministry of Jesus Christ, the scriptures, the establishment and authority of the church, its use of ceremonies, symbols and sacraments, and especially the obligations felt by each individual.
Broadly speaking, the concept of the Inner Light is twofold. Firstly, the Inner Light discerns between good and evil. It reveals the presence of both in human beings, and through its guidance, offers the alternative of choice. Secondly, the Inner Light opens the unity of all human beings to our consciousness. Friends believe that the potential for good, as well as evil, are latent in everyone. See http://www.fwccemes.org/quakers/meeting-the-spirit?pg=2