This study grew from the question 'How should we educate in religion?' asked in a philosophical context. The question is half answered when the concepts 'educate' and 'religion' are fully understood. But this is too large a task. So, of the two concepts, 'religion' was chosen. But this is still too large a task. So the questions arose 'Which part of religion causes the most difficulty when considering how to educate in religion? And which part of religion is most suitable for philosophical consideration?'
The answer was easy. Religious language. .Religious rituals, practices and feelings all presuppose (for their meaning) religious beliefs of some kind, expressed in religious language. Religious language includes expressing a religious person's beliefs, reflecting systematically upon such beliefs (as in theology), and reflecting on the different meanings theological language can have (often called meta-theology). These three levels are all important and not entirely independent. (From Introduction)