13. On attending to a request which has been addressed to Him, God desires to recompense the intention, the devotion and the faith of the one who prays. This is why the prayers of a good person have greater merit in God's eyes and are always more effective, because the corrupt and evil person cannot pray with the same fervour and confidence which comes only from a sentiment of true piety. From a selfish heart, the one who prays only from the lips, there can come only words, and never a charitable impulse which is what gives force to prayer. So clearly can this be understood, that on asking for the prayers of another person instinctively preference will be given to those whose conduct, it is felt, will be more agreeable to God because they will be more promptly heard.