Psalms 98:2

To this I replied, “If I were to be quarrelsome and light-minded like you, Trypho, I would no longer continue to converse with you, since you are prepared not to understand what has been said, but only to return some captious answer; but now, since I fear the judgment of God, I do not state an untimely opinion concerning any one of your nation, as to whether or not some of them may be saved by the grace of the Lord of Sabaoth. Therefore, although you act wrongfully, I shall continue to reply to any proposition you shall bring forward, and to any contradiction which you make; and, in fact, I do the very same to all men of every nation, who wish to examine along with me, or make inquiry at me, regarding this subject. …

4. “The Lord is great in Sion, and high above all people” ( ver. 2 ).…He whom I spoke to thee of as above the Cherubims, is great in Sion. Ask thou now, what is Sion? We know Sion to be the city of God. The city of Jerusalem is called Sion; and is so called according to a certain interpretation, for that Sion signifieth watching, that is, sight and contemplation; for to watch is to look forward to, or gaze upon, or strain the eyes to see. Now every soul is a Sion, if it trieth to see that light which is to be seen. For if it shall have gazed upon a light of its own, it is darkened; if upon His, it is enlightened. But, now that it is clear that Sion is the city of God; what is the city of God, but the Holy Church? For men who love one another, and who love their God who dwelleth in them, constitute a city unto God. …