The dual dimension of the Christian liturgy as a response of faith and love to the spiritual blessings the Father bestows on us is thus evident. On the one hand, the Church, united with her Lord and "in the Holy Spirit," blesses the Father "for his inexpressible gift in her adoration, praise, and thanksgiving. On the other hand, until the consummation of God's plan, the Church never ceases to present to the Father the offering of his own gifts and to beg him to send the Holy Spirit upon that offering, upon herself, upon the faithful, and upon the whole world, so that through communion in the death and resurrection of Christ the Priest, and by the power of the Spirit, these divine blessings will bring forth the fruits of life "to the praise of his glorious grace."
Source: Catechism of the Catholic Church (Vatican.va)