SO GOOD QUOTES

19. The demon of unchastity is powerful and violently attacks those who struggle against passion, particularly if they are lax about matters of diet and often meet women. With the lubricity of sensual pleasure he imperceptibly steals into the intellect and thereafter persecutes the hesychast by means of the memory, setting his body on fire and presenting various forms to his intellect. In this way he evokes his assent to sin. If you do not want these forms to linger in you, turn again to fasting, labor, vigils and blessed stillness with intense prayer.

—St. Maximos the Confessor, Four Hundred Texts on Love