THEOSISCyrill of Alexandria
And in that day, the people will proclaim, "Look, our God, in whom we have placed our trust; He will deliver us. We have endured trials for the Lord, and we will rejoice and be glad because of our salvation." The Almighty will grant peace on this holy mountain. Know Him who brings gladness, who offers the cup of joy, and who blesses with tranquility those in spiritual Zion; recognize that He is indeed God and the Son, naturally born of the Father, even though He took the likeness of a servant. For the salvation and life of all, He became incarnate, sharing in the fullness of human experience except for sin.
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As if reaching out His hand, they declare, "This is our God, in whom we have trusted, let us rejoice in our deliverance!" It seems especially fitting to attribute this declaration to the Israelites, who, taught by Moses and aware of the prophets' forecasts, anticipated the arrival of a Savior and Redeemer, our Lord Jesus Christ. As previously mentioned, Zechariah, the father of John the Baptist, prophesied in the Holy Spirit about Christ, declaring that a horn of salvation would be raised for the people. Similarly, Simeon, when he took the Holy Child in his arms, proclaimed, "My eyes have seen Thy salvation, which Thou hast prepared before the face of all people" (Luke 2:30, 31). Thus, those who recognize their Savior and Advocate, the hope of all who was foretold since ancient times, will declare, "This is our God," and affirm that God will grant peace on this mountain. Moreover, understand that this mountain signifies the Church; for within it is rest, as Christ invites, "Come unto Me, all ye that labor and are heavy laden, and I will give you rest" (Matthew 11:28). Through faith in Him, we are freed from the crushing burden of sin and find comfort in Him, as well as liberation from the dread of the inevitable consequences for our wrongdoings. The love of Christ, our Savior, does not stop there; it also promises additional blessings—entrance into the kingdom of heaven, eternal and unending life, and freedom from all that brings distress. For it is said of the saints that everlasting joy crowns their heads.