“The Divine Light illumines the pure heart and the pure intellect, because these are susceptible to receiving light; whereas impure hearts and intellects, not being susceptible to receiving illumination, have an aversion to the light of knowledge, the light of truth; they like darkness… God loves those who have a pure heart, listens to their prayers, grants them their requests that lead to salvation, reveals Himself to them and teaches the mysteries of the Divine nature.”
(St Nektarios of Aegina, collected quotes by Fr Serfes)