Art speaks in way that words alone cannot for as well as presenting the image, it is instrinsic to art that it connects and establishes relationships, between the viewer and the prototype, via the image and using the imagination. This stimulates the faculty by which we ‘see’ the invisible through the visible and so is essential to the development and retention of faith in God.
Iconography and Iconology are the study of the sacred image and the symbolism of the content respectively. Jonathan Pageau is someone who is both a master craftsman and and a deep understanding of both. This has relevance in the Christian life way beyond the church building, it extends out into every human endeavor.