All worship was to him sacred, since he believed that in its most degraded forms, among the most ignorant and foolish of worshippers, there has yet been some true seeking after the Divine, and that between these and the most glorious ritual or the highest philosophic certainty, there lies so small a space that we may believe the Saints in Paradise regard it with a smile.
Via Potemra, who says "It’s from Elizabeth Waterhouse’s Thoughts of a Tertiary, and it was used by Evelyn Underhill as one of the epigraphs to her classic book Worship"