How doth the Spirit help us to pray?
We not knowing: What to pray for as we ought, the Spirit helps our infirmities, by enabling us to understand both for whom, and: What, and: How prayer is to be made; and by working and quickening in our hearts (although not in all persons, nor at all times, in the same measure) those apprehensions, affections, and graces which are requisite for the right performance of that duty.1
Scripture proofs
The Westminster Assembly's proof texts (KJV). The bracketed numbers in the answer above mark the clause each set of references supports; expand a row to read the verses.
1 Rom. 8:26–27; Ps. 10:17; Zech. 12:10
Rom. 8:26 Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered.
Rom. 8:27 And he that searcheth the hearts knoweth what is the mind of the Spirit, because he maketh intercession for the saints according to the will of God.
LORD, thou hast heard the desire of the humble: thou wilt prepare their heart, thou wilt cause thine ear to hear:
And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplications: and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn.
This doctrine across the Standards
Where the Confession and the Westminster Shorter Catechism treat the same matter, so the question can be studied alongside its parallel statements.
In the Westminster Confession
XXI.3 Prayer with thanksgiving, being one special part of religious worship, is by God required of all men; and …
Prayer with thanksgiving, being one special part of religious worship, is by God required of all men; and that it may be accepted, it is to be made in the name of the Son, by the help of his Spirit, according to his will, with understanding, reverence, humility, fervency, faith, love, and perseverance; and, if vocal, in a known tongue.
→ XXI.3 · Of Religious Worship and the Sabbath DayXXI.4 Prayer is to be made for things lawful, and for all sorts of men living, or that shall …
Prayer is to be made for things lawful, and for all sorts of men living, or that shall live hereafter; but not for the dead, nor for those of whom it may be known that they have sinned the sin unto death.
→ XXI.4 · Of Religious Worship and the Sabbath DayIn the Westminster Shorter Catechism
Q.98 What is prayer?
Prayer is an offering up of our desires unto God, for things agreeable to his will, in the name of Christ, with confession of our sins, and thankful acknowledgement of his mercies.
→ Open Q.98Q.99 What rule hath God given for our direction in prayer?
The whole Word of God is of use to direct us in prayer; but the special rule of direction is that form of prayer which Christ taught his disciples, commonly called The Lord's Prayer.
→ Open Q.99Q.100 What doth the preface of the Lord's Prayer teach us?
The preface of the Lord's Prayer, which is, Our Father which art in heaven, teacheth us to draw near to God with all holy reverence and confidence, as children to a father, able and ready to help us; and that we should pray with and for others.
→ Open Q.100Q.101 What do we pray for in the first petition?
In the first petition, which is, Hallowed be thy name, we pray, that God would enable us, and others, to glorify him in all that whereby he maketh himself known; and that he would dispose all things to his own glory.
→ Open Q.101Q.102 What do we pray for in the second petition?
In the second petition, which is, Thy kingdom come, we pray, that Satan's kingdom may be destroyed; and that the kingdom of grace may be advanced, ourselves and others brought into it, and kept in it; and that the kingdom of glory may be hastened.
→ Open Q.102Q.103 What do we pray for in the third petition?
In the third petition, which is, Thy will be done in earth, as it is in heaven, we pray, that God, by his grace, would make us able and willing to know, obey, and submit to his will in all things, as the angels do in heaven.
→ Open Q.103Q.104 What do we pray for in the fourth petition?
In the fourth petition, which is, Give us this day our daily bread, we pray that of God's free gift we may receive a competent portion of the good things of this life, and enjoy his blessing with them.
→ Open Q.104Q.105 What do we pray for in the fifth petition?
In the fifth petition, which is, And forgive us our debts, as we forgive our debtors, we pray that God, for Christ's sake, would freely pardon all our sins; which we are the rather encouraged to ask, because by his grace we are enabled from the heart to forgive others.
→ Open Q.105Q.106 What do we pray for in the sixth petition?
In the sixth petition, which is, And lead us not into temptation, but deliver us from evil, we pray, that God would either keep us from being tempted to sin, or support and deliver us when we are tempted.
→ Open Q.106Q.107 What doth the conclusion of the Lord's Prayer teach us?
The conclusion of the Lord's Prayer, which is, For thine is the kingdom, and the power, and the glory, for ever, Amen. teacheth us to take our encouragement in prayer from God only, and in our prayers to praise him, ascribing kingdom, power, and glory to him; and, in testimony of our desire, and assurance to be heard, we say, Amen.
→ Open Q.107