Spirituality begins
According to my Master, spirituality really begins where religion ends. While the basic education of man can be undertaken by religion, his further development, when he has reached what may be termed adulthood, can only be offered by spirituality. Spirituality is easily identifiable with mysticism in all its aspects. Religion enforces an externalization of the mind in man's search for God. Mysticism or spirituality internalizes the search and directs the mind to the heart of man, where the search should really commence.
Taken from the book "The Principles of Sahaj Marg, Set 1, Vol. 1", Chapter "Religion and Spirituality" pg. 6, by Revered Chariji. Sahaj Marg Spirituality Foundation, Inc.