At the literal level, the psalmist voices praise, lament, thanksgiving, or petition before God. A pivotal line is verse 3: "As the dew of Hermon, which descendeth upon mount Sion. For there the Lord hath commanded blessing, and life for evermore. "
The Church teaches that every passage of Scripture must be read in light of Christ and the Magisterium (CIC 1604). Here, the Psalms are the prayer book of the Church, prayed daily in the Liturgy of the Hours (CIC 2585-2589). The spiritual sense invites believers to recognize prayer, praise, and the full range of human emotion before God as part of God's pedagogy of salvation.
Applied to the life of faith, the passage supports the Church's conviction that God invites us to bring all our emotions to Him. Whether read privately or heard in the liturgy, Psalms 132 calls for a response of faith, repentance, and charity.