Elder Ephraim of Arizona on Purity of Mind
“My child, fight the good fight of eternal life. Make a good beginning to obtain an excellent end. Keep your nous entirely engrossed in the recollection of Jesus, and He will become everything for you—joy, peace, mourning, and a multitude of life-flowing tears, which will make your soul whiter than snow and lighter than a cloud. My child, when you keep silent and say the prayer with attention—that is, when the nous pays attention to the prayer being said, without wandering off into something else other than the prayer—then your nous will begin to draw near to the sweetness of Jesus. Constantly humbling yourself will greatly help you achieve this goal. Humility is reproaching yourself always in any temptation or any matter whatsoever, and always justifying your brother.
The greatest temple, in which God delights to dwell, is that which He skillfully crafted with His own hands—our entire being, our soul, as long as it is pure. Purity of heart consists in the nous being free from evil thoughts, from which evil and passionate feelings originate which cause the body to be passionately excited. For it is then that both soul and body are defiled, and to a certain degree their purity and spotlessness are lost.”
– ‘Counsels from the Holy Mountain’