When we pray we renounce merit. See them opposed, ‘Whom, though I were righteous, yet would I not answer, but I would make supplication to my judge,’ Job 9:15. We might show the same in all the other attributes. But this taste from a few may suffice. And as God, essentially considered, receives by prayer an acknowledgement of his deity; so every person in the sacred Trinity, Father, Son, and Holy Ghost, in prayer are honoured. By directing our prayers to God the Father, we honour him as the source and fountain of all grace and mercy. We honour the Son in presenting our prayers in his name to the Father, thereby acknowledging him the purchaser of the mercies we beg. And the Holy Ghost, he receives the honour of that assistance which we acknowledge to receive from him for the duty of prayer. For as we pray to the Father through the Son, so by the help of the Spirit.
2. As God is honoured in the very act and exercise of his duty duly qualified, so by it the Christian is deeply engaged, and also sweetly disposed, to praise God for, and glorify him with, the mercies he obtains by prayer.
(1.) Prayer engageth to praise God because of his mercies. In prayer we do not only beg mercy of God, but vow praise to God for the mercies we beg. Prayers are called ‘vows,’ ‘Thou, O God, hast heard my vows;’ Ps. 61:5; that is, my prayers, in which I solemnly vowed praise for the deliverance I begged. It is no prayer where no vow is included. We must not think to bind God and leave ourselves free. God ties himself in the promise to help us; but the condition of the ob¬ligation on our part, is, that we will glorify him. And upon no other terms doth God give us leave to ask any mercy at his hands. ‘Call upon me in the day of trouble: I will deliver thee, and thou shalt glorify me,’ Ps. 50:15. Now, what a strong tie doth this lay upon the praying Christian’s heart, to use the mercies he receives holily, and to wear with thankfulness what he wins by prayer! The Christian who would be loath to be taken in a lie to man, will much more fear to be found a liar to God. ‘Surely they are my people,’ saith God; ‘children that will not lie; so he was their Saviour,’ Isa. 63:8.
(2.) Prayer is a means to dispose the heart to praise. Prayer and praise, like the symbolical qualities in the elements, are soon resolved each into the other. When David begins a psalm with prayer, he commonly ends it with praise. From whence things have their original, thither they return. From the sea the riverwater comes, and no mountains can hinder, but back again to the sea it will go. That spirit which leads the soul out of itself to God for supply, will direct it to the same God with his praise. We do not use to borrow money of one man and pay it to another. If God hath been thy ‘strength,’ surely thou wilt make him thy ‘song.’ The thief comes not to thank a man for what he steals out of his yard. And I as little wonder that they do not glorify God for or with his mercies, who did not ask his leave by prayer for them. What men do by themselves they ascribe to themselves. Mercies ill got are commonly as ill spent: because they are not sanctified to them, and so become fuel to feed their lusts. Hence it is, the more enjoyments they have the more proud and unthankful they are. But by prayer the Christian’s enjoyments are sanctified, and the flatulency of them, which puffs up others into pride, is corrected; and the same mercies received by prayer, become nourishment to the saints' graces, that putrefy and turn to noisome lusts in the prayerless sinner.
Answer Third. God will have his people pray for what he hath purposed and promised, to show the great delight he takes in their prayers. As a father, though he can send to his son who lives abroad the money he hath promised for his maintenance, yet let him not have it except he comes over at set times for it. And why? Not to trouble his son, but delight himself in his son’s company. God takes such content in the company of his praying saints, that to prevent all strangeness on their part, he orders it so that they cannot neglect a duty but they shall lose something by it. ‘Ye have not, because ye ask not.’ And the more they abound in prayer the more they shall with blessings. The oftener Joash had ‘smote upon the ground,’ the fuller his victory over Syria had been. As the arrows of prayer are that we shoot to heaven, so will the returns of mercy from thence be. Yet must it not be imputed to any loathness in God to give, that he makes them pray often and long before the mercy comes, but rather to the content he takes in our prayers. He doth all this on a design to draw out the graces of his Spirit in his children, the voice and language of which in prayer makes most sweet melody in the ear of God. The truth is, we are in this too like musicians playing under our window; they play while the money is thrown out to them, and then their pipes are put up. And were our wants so supplied by the answer of one prayer, that we did not suddenly need a new recruit, we would be gone, and God should not hear of us in haste.