“The Faith received in the Church we guard in it, which being always from the Spirit of God, like an admirable deposit in a good vessel, is young itself, and makes young the vessel in which it is. For this office on the part of God(225) is intrusted to the Church, as the breath of life was given to the body, in order that all the members receiving may be quickened, and in this is placed the communication of Christ, that is, the Holy Spirit, the earnest of incorruption, the confirmation of our faith, and the ladder by which we ascend to God. For, says he, in the Church God has placed Apostles, Prophets, Teachers, and all the remaining operation of the Spirit; of whom all those are not partakers who do not run to the Church, but deprive themselves of life by an evil opinion and a still worse conduct. For where the Church is, there also is the Spirit of God: and where the Spirit of God is, there is the Church and all grace: but the Spirit is Truth. Wherefore they who are not partakers of Him are neither nourished unto life from the breasts of the mother, nor receive that most pure fountain which proceeds from the Body of Christ, but dig out for themselves broken cisterns from earthly ditches, and from the filth drink foul water, avoiding the Faith of the Church lest they be brought back, and rejecting the Spirit that they may not be taught. So estranged from the truth they deservedly wallow in every error, tossed about by it, having different opinions on the same subjects at different times, and never holding one firm mind, choosing rather to be sophists of words than disciples of the truth; for they are not founded upon the one rock, but on the sand, which has in it a multitude of pebbles.”(226) And he elsewhere contrasts the certainty within, and the uncertainty without, this teaching power: