Whether we ought to call upon the saints to pray for us?

Objections

Objection 1 : It would seem that we ought not to call upon the saints to pray for us. For no man asks anyone's friends to pray for him, except in so far as he believes he will more easily find favor with them. But God is infinitely more merciful than any saint, and consequently His will is more easily inclined to give us a gracious hearing, than the will of a saint. Therefore it would seem unnecessary to make the saints mediators between us and God, that they may intercede for us.
Objection 2 : Further, if we ought to beseech them to pray for us, this is only because we know their prayer to be acceptable to God. Now among the saints the holier a man is, the more is his prayer acceptable to God. Therefore we ought always to bespeak the greater saints to intercede for us with God, and never the lesser ones.
Objection 3 : Further, Christ, even as man, is called the "Holy of Holies," and, as man, it is competent to Him to pray. Yet we never call upon Christ to pray for us. Therefore neither should we ask the other saints to do so.
Objection 4 : Further, whenever one person intercedes for another at the latter's request, he presents his petition to the one with whom he intercedes for him. Now it is unnecessary to present anything to one to whom all things are present. Therefore it is unnecessary to make the saints our intercessors with God.
Objection 5 : Further, it is unnecessary to do a thing if, without doing it, the purpose for which it is done would be achieved in the same way, or else not achieved at all. Now the saints would pray for us just the same, or would not pray for us at all, whether we pray to them or not: for if we be worthy of their prayers, they would pray for us even though we prayed not to them, while if we be unworthy they pray not for us even though we ask them to. Therefore it seems altogether unnecessary to call on them to pray for us.