4. And lastly, with regard to the words of our Lord _that we ought always to pray and not to faint_,[231] and those of S. Paul, _Pray without ceasing_,[232] we must remark that a man prays without ceasing, either because of the unceasing nature of his desire, as we have above explained; or because he does not fail to pray at the appointed times; or because of the effect which his prayer has, whether upon himself--since even when he has finished praying he still remains devout--or upon others, as, for instance, when a man by some kind action induces another to pray for him whereas he himself desists from his prayer.
"Our soul waiteth for the Lord; for He is our helper and protector. For in Him our hearts shall rejoice; and in His Holy Name we have trusted. Let Thy mercy, O Lord, be upon us, as we have hoped in Thee."[233]
On the words of the Psalmist, _My prayer shall be turned into my bosom_,[234] the interlinear Gloss has: "And if it is of no profit to them (for whom it is offered), at least I myself shall not lose my reward." A reward, however, can only be due to merit. Prayer, then, is meritorious.
As we have said above, prayer has, besides the effect of spiritual consolation which it brings with it, a twofold power regarding the future: the power, namely, of meriting, and that of winning favours. But prayer, as indeed every other virtuous act, derives its power of meriting from that root which is charity, and the true and proper object of charity is that Eternal Good, the enjoyment of Which we merit. Now prayer proceeds from charity by means of the virtue of religion whose proper act is prayer; there accompany it, however, certain other virtues which are requisite for a good prayer--namely, faith and humility. For it belongs to the virtue of religion to offer our prayers to God; while to charity belongs the desire of that the attainment of which we seek in prayer. And faith is necessary as regards God to Whom we pray; for we must, of course, believe that from Him we can obtain what we ask. Humility, too, is called for on the part of the petitioner, for he must acknowledge his own needs. And devotion also is necessary; though this comes under religion of which it is the first act, it conditions all subsequent effects.