Theology and Mysticism in the Tradition of the Eastern Church, by Vladimir Lossky
There is, therefore, no Christian mysticism without theology; but, above all, there is no theology without mysticism. It is not by chance that the tradition of the Eastern Church has reserved the name of ‘theologian’ peculiarly for three sacred writers of whom the first is St. John, most ‘mystical’ of the four Evangelists; the second St. Gregory Nazianzen, writer of contemplative poetry; and the third St. Symeon, called ‘the New Theologian’, the singer of union with God. Mysticism is accordingly treated in the present work as the perfecting and crown of all theology: as theology par excellence.
TimothyOne 