Mysticism in Shaivism and Christianity

If mysticism is hard to define, what is it then ? Or, why have mystics often spoken about what they have realized - notwithstanding the 'unspeakability' of a spiritual experience ? And, yet more significantly, how can a meeting point of different religious traditions be discovered at the mystical level ? Focussing on these and other related questions, eminent scholars from varying religious traditions here explore the nature of mystical experience in two of the world's major traditions: Hinduism and Christianity.