Romans 8:26

²³And not only they, but ourselves also, which have the firstfruits of the Spirit, even we ourselves groan within ourselves, waiting for the adoption, to wit, the redemption of our body. ²⁴For we are saved by hope: but hope that is seen is not hope: for what a man seeth, why doth he yet hope for? ²⁵But if we hope for that we see not, then do we with patience wait for it. ²⁶Likewise 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. ²⁷And 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. ²⁸And we know that all things work together for good to them that love God, to them who are the called according to his purpose. ²⁹For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren.

Paul’s fullest letter on grace, faith and life in the Spirit, written to the church in Rome.