Cyrill of Alexandria
He does not permit them to become complacent or paralyzed by fear; instead, He inspires them to be diligent and instills in them a fervent passion. Simultaneously, He equips them for faith and strengthens them, urging them to maintain courage, while promising even greater support and a desire to be with them. He confirms this by declaring, “My Spirit shall stand in the midst of you, be bold.” It is hardly conceivable that a person with sound judgment and a steadfast mind would doubt that God will grant strength and courage to those who earnestly strive to nurture His divine temple, namely the Church, for He will be present through the Holy Spirit, enabling all successes within them, which will allow them to reveal their lives as a magnificent and glorious sanctuary.
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Likewise, the Lord assured the holy Apostles, who were to establish the Church and gather the faithful into the holy temple, by saying, “Behold, I am with you” (Matthew 28:20). Furthermore, He clearly indicates the necessity of being with them again through the Spirit when He states, “I will not leave you orphans; I will come to you” (John 14:18), further explaining that His departure is essential: “For if I do not go away, the Comforter will not come to you; but if I depart, I will send Him to you” (John 16:7). Thus, He remains with those who build Him a temple, while He distances Himself from and completely separates from those who reject Him, which can include those who, inspired by Beelzebub, “speak anathema to Jesus” (1 Cor. 12:3) and corrupt the truth, infusing harmful poison into the souls of the innocent.