Matthew Henry Commentary Romans 8:26-27

"And in like manner the Spirit also helpeth our infirmity: for we know not how to pray as we ought; but the Spirit himself maketh intercession for [us] with groanings which cannot be uttered; 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." — Romans 8:26-27 (ASV)

Though the infirmities of Christians are many and great, so that they would be overpowered if left to themselves, yet the Holy Spirit supports them.

The Spirit, as an enlightening Spirit, teaches us what to pray for; as a sanctifying Spirit, produces and stirs up the graces for prayer; as a comforting Spirit, silences our fears and helps us overcome all discouragements. The Holy Spirit is the spring of all desires toward God, which are often more than words can utter.

The Spirit who searches hearts can perceive the mind and will of the human spirit—the renewed mind of believers—and advocates their cause. The Spirit makes intercession to God, and the enemy does not prevail.