The previous psalm has the Lord, the Great Most High God entering his temple on Mount Zion. Beneath the temple is the City of David where the people of Jerusalem lived. The Lord God is praised and worshiped in the temple Solomon built in Jerusalem. Though God dwells in heaven and his presence is in all the earth, Jerusalem was the place the Lord chose to meet with his people. It is beautiful because of the Lord. Though Jerusalem is a fortified city with citadels, the Lord is the true fortress.
Since the Lord Jesus died, rose from death, ascended to heaven, and sent the Holy Spirit to dwell in his people, I am the temple of God. Apostle Paul wrote to the congregation in Corinth, “Don’t you know that you yourselves are God’s temple and that God’s Spirit lives in you? If anyone destroys God’s temple, God will destroy him; for God’s temple is sacred, and you are that temple.” (1 Corinthians 3:16-17, 6:9) I am scared. I am beautiful. God is my fortification.