34. The mind is the temple of the Holy Trinity. - Evagrius Ponticus

153. When you give yourself to prayer, rise above every other joy — then you will find true prayer.

70. You will not be able to pray purely if you are all involved with material affairs and agitated with unremitting concerns. For prayer is the rejection of concepts.

23. The mind cannot see the place of God within itself, unless it has transcended all the mental representations associated with objects. Nor will it transcend them, if it has not put off the passions that bind it to sensible objects through mental representations. And it will lay aside the passions through the virtues, and simple thoughts through spiritual contemplation; and this in turn it will lay aside when there appears to it the light.