Origen of Alexandria : "And Isaac built there an altar, and called upon the name of the Lord, and pitched there his tent. And the servants of Isaac dug there a well." Isaac indeed builds an altar even in the Law and pitches his tent; but in the Gospels he does not pitch a tent, but builds a house and lays a foundation. For hear Wisdom saying of the Church: "wisdom," it says, "built herself a house, and set up seven columns." Hear also Paul saying of this: "for no one can lay a foundation besides that which has been laid, which is Christ Jesus." Where therefore there is a tent, even if it be pitched, without doubt it must be dissolved; but where there are foundations and the house is built "upon the rock," that house is never dissolved, "for it has been founded upon the rock." Nevertheless Isaac there too digs a well, and never ceases from digging wells, until there arises "a fountain of living water" and "the rush of the river gladdens the city of God." — HOMILIES ON Genesis 14.2