"By His divine virtue or by the gift of the Holy Spirit He is the efficient and universal cause of all grace. His humanity is the instrument of the divinity. It effects in souls that increase of the supernatural life which transforms them and enables them to present to the eyes of the Father the true image of His incarnate Son. Christ acts through the sacraments, but He acts also apart from them; prayer, the contemplation of His mysteries, humility, and love in all its forms, prepare the soul for His action upon it."

Blessed Columba Marmion, Christ--The Ideal of the Priest