Theophan the Recluse says: ‘You ask yourself, “Have I prayed well today?” Do not try to find out how deep your emotions were, or how much deeper you understand things divine; ask yourself: “Am I doing God’s will better than I did before?” If you are, prayer has brought its fruits, if you are not, it has not, whatever amount of understanding or feeling you may have derived from the time spent in the presence of God.’
–Anthony Bloom (1914-2003)