Another point of the utmost importance is that you have lately been tossed and harassed by sexual lusts. This always happens when our practices of the Prayer are beyond our abilities and capacities. Read, in the foreword to Philotheus of Sinai,” how easily the sensation of heat, caused by prayer, can turn to sexual lust, setting the blind heart on fire, filling the mind with the smoke of lascivious images and thoughts, and causing flesh to yearn for the touch of flesh.