Likewise. — While on the one hand the prospect of salvation sustains him, so on the other hand the Divine Spirit interposes to aid him. The one source of encouragement is human (his own human consciousness of the certainty of salvation), the other is divine.
Infirmities. — The correct reading is the singular, “infirmity.” Without this assistance we might be too weak to endure, but the Spirit helps and strengthens our weakness by inspiring our prayers.
With groanings which cannot be uttered. — When the Christian’s prayers are too deep and too intense for words, when they are rather a sigh heaved from the heart than any formal utterance, then we may know that they are prompted by the Spirit Himself. It is He who is praying to God for us.