As just remarked, there are two main forms of ecstatic longing for God: - Gregory of Sinai

According to theologians, noetic, pure, angelic prayer is in its power wisdom inspired by the Holy Spirit.

The source and ground of our distractive thoughts is the fragmented state of our memory. The memory was originally simple and one-pointed, but as a result of the fall its natural powers have been perverted: it has lost its recollectedness in God and has become compound instead of simple, diversified instead of onepointed.

When you sit in stillness, by day or by night, free from random thoughts and continuously praying to God in humility, you may find that your intellect becomes exhausted through calling upon God and that your body and heart begin to feel pain because of the intense concentration with which you unceasingly invoke the name of Jesus, with the result that you no longer experience the warmth and joy that engender ardour and patience in the spiritual aspirant. If this is the case, stand up and psalmodize, either by yourself or with a disciple who lives with you, or occupy yourself with meditation on some scriptural passage or with the remembrance of death, or with manual labour or with some other thing, or give your attention to reading, preferably standing up so as to involve your body in the task as well. ... With the help of prayer ignore all images, whether sensory or conceptual, that rise up from the heart. For stillness means the shedding of all thoughts for a time, even those which are divine and engendered by the Spirit; otherwise through giving them our attention because they are good we will lose what is better.