Make room for Christ. When you possess Christ you are a rich man, for he is sufficient for you. He himself shall provide for you and faithfully administer all your cares. Put all your trust in God...
[Excerpt from the Imitation of Christ]

The titles given to the Holy Spirit must surely stir the soul of anyone who hears them, and make him realize that they speak of nothing less than the supreme Being.... But his principal and most personal title is the Holy Spirit.
[From the treatise On the Holy Spirit by Saint Basil the Great, bishop]

“Let us fix our attention on the blood of Christ and recognize how precious it is to God his Father, since it was shed for our salvation and brought the grace of repentance to all the world.”
[From a letter to the Corinthians by Saint Clement, pope]

Christ himself is both victim and priest according to the spirit. For he offers the victim to the Father according to the flesh, and he is himself offered on the altar of the cross.
[Excerpt from a homily on Genesis by Origen, priest]