John Wesley on Romans 8:26

Likewise the Spirit - Nay, not only the universe, not only the children of God, but the Spirit of God also himself, as it were, groaneth, while he helpeth our infirmities, or weaknesses. Our understandings are weak, particularly in the things of God our desires are weak; our prayers are weak. We know not - Many times. What we should pray for - Much less are we able to pray for it as we ought: but the Spirit maketh intercession for us - In our hearts, even as Christ does in heaven. With groanings - The matter of which is from ourselves, but the Spirit forms them; and they are frequently inexpressible, even by the faithful themselves.