The Demonstrations begin
1 I have received your letter, my beloved, and when I read it, it greatly gladdened me that you have turned your thoughts to these investigations. For this thing that you have asked of me shall be freely granted, for freely it was received. And whosoever has, and desires to withhold from him that seeks, whatsoever he withholds shall be taken away from him. Whoever of free grace receives, of free grace also does it behoove him to give. And so, my beloved, as to that which you have asked of me, so far as my insignificance has apprehended, I will write to you. And also whatsoever you have not sought of me, invoking God, I will explain to you. Hear then, my beloved, and open the inward ears of your heart unto me, and the spiritual perceptions of your mind to that which I say unto you.
2. Faith is compounded of many things, and by many kinds is it brought to perfection. For it is like a building that is built up of many pieces of workmanship and so its edifice rises to the top. And know, my beloved, that in the foundations of the building stones are laid, and so resting upon stones the whole edifice rises until it is perfected. Thus also the true Stone, our Lord Jesus Christ, is the foundation of all our faith. And on Him, on [this] Stone faith is based. And resting on faith all the structure rises until it is completed. For it is the foundation that is the beginning of all the building. For when any one is brought near unto faith, it is laid for him upon the Stone, that is our Lord Jesus Christ. And his building cannot be shaken by the waves, nor can it be injured by the winds. By the stormy blasts it does not fall, because its structure is reared upon the rock of the true Stone. And in this that I have called Christ the Stone, I have not spoken of my own thought, but the Prophets beforehand called Him the Stone. And this I shall make clear to you.
3. And now hear concerning faith that is based upon the Stone, and concerning the structure that is reared up upon the Stone. For first a man believes, and when he believes, he loves. When he loves, he hopes. When he hopes, he is justified. When he is justified, he is perfected. When he is perfected, he is consummated. And when his whole structure is raised up, consummated, and perfected, then he becomes a house and a temple for a dwelling-place of Christ, as Jeremiah the Prophet said:— The temple of the Lord, the temple of the Lord, the temple of the Lord are you, if you amend your ways and your works. And again He said through the Prophet:— I will dwell in them and walk in them. And also the Blessed Apostle thus said:— You are the temple of God and the spirit of Christ dwells in you. And also our Lord again thus said to His disciples:— You are in Me and I am in you.
4. And when the house has become a dwelling-place, then the man begins to be anxious as to that which is required for Him Who dwells in the building. Just as if a king or an honourable man, to whom a royal name is given, should lodge in the house, there would be required for the King all the appurtenances of royalty and all the service that is needed for the King's honour. For in a house that is void of all good things, the King will not lodge, nor will he dwell in the midst of it; but all that is choicest in the house is required for the King and that nothing in it be deficient. And if anything be deficient there in the house in which the King lodges, the keeper of the house is delivered over to death, because he did not make ready the service for the King. So also let the man, who becomes a house, yea a dwelling-place, for Christ, take heed to what is needed for the service of Christ, Who lodges in him, and with what things he may please Him. For first he builds his building on the Stone, which is Christ. On Him, on the Stone, is faith based, and on faith is reared up all the structure. For the habitation of the house is required pure fasting, and it is made firm by faith. There is also needed for it pure prayer, and through faith is it accepted. Necessary for it too is love, and with faith is it compounded. Furthermore alms are needed, and through faith are they given. He demands also meekness, and by faith is it adorned. He chooses too virginity, and by faith is it loved. He joins with himself holiness, and in faith is it planted. He cares also for wisdom, and through faith is it acquired. He desires also hospitality, and by faith does it abound. Requisite for Him also is simplicity, and with faith is it commingled. He demands patience also, and by faith is it perfected. He has respect also to long-suffering, and through faith is it acquired. He loves mourning also, and through faith is it manifested. He seeks also for purity, and by faith is it preserved. All these things does the faith demand that is based on the rock of the true Stone, that is Christ. These works are required for Christ the King, Who dwells in men that are built up in these works.
5. And if perchance you should say:— If Christ is set for the foundation, how does Christ also dwell in the building when it is completed? For both these things did the blessed Apostle say. For he said:— I as a wise architect have laid the foundation. And there he defined the foundation and made it clear, for he said as follows:— No man can lay other foundation than that which is laid, which is Jesus Christ. And that Christ furthermore dwells in that building is the word that was written above— that of Jeremiah who called men temples and said of God that He dwelt in them. And the Apostle said:— The Spirit of Christ dwells in you. And our Lord said:— I and My Father are one. And therefore that word is accomplished, that Christ dwells in men, namely, in those who believe in Him, and He is the foundation on which is reared up the whole building.
6. But I must proceed to my former statement that Christ is called the Stone in the Prophets. For in ancient times David said concerning Him:— The stone which the builders rejected has become the head of the building. And how did the builders reject this Stone which is Christ? How else than that they so rejected Him before Pilate and said— This man shall not be King over us. And again in that parable that our Lord spoke that a certain nobleman went to receive kingly power and to return and rule over them; and they sent after Him envoys saying:— This man shall not be King over us. By these things they rejected the Stone which is Christ. And how did it become the head of the building? How else than that it was set up over the building of the Gentiles and upon it is reared up all their building. And who are the builders? Who but the priests and Pharisees who did not build a sure building, but were overthrowing everything that he was building, as is written in Ezekiel the Prophet:— He was building a wall of partition, but they were shaking it, that it might fall. And again it is written:— I sought among them a man who was closing the fence and standing in the breach over the face of the land, that I might not destroy it and I did not find. And furthermore Isaiah also prophesied beforehand with regard to this stone. For he said:— Thus says the Lord, Behold I lay in Zion a chosen stone in the precious corner, the heart of the wall of the foundation. And he said again there:— Every one that believes in it shall not fear. And whosoever falls on that stone shall be broken, and every one on whom it shall fall, it will crush. For the people of the house of Israel fell upon Him, and He became their destruction for ever. And again it shall fall on the image and crush it. And the Gentiles believed on it and do not fear.
Source: Demonstrations (New Advent)