The Church is called to persevere in their calling to worship God and believe in his appointed Messiah, sanctifying themselves in preparation for his Kingdom, and testifying to all nations of the judgment and restoration of that Kingdom. However, perseverance in this calling is wholly dependent upon God and his grace, by means of the Holy Spirit’s empowerment.  (Acts 1:4-8)

The Holy Spirit is given by God as a deposit (cf. 2 Cor. 5:5; Eph. 1:14; etc.) of the grace (Gk. charis) that will be given the saints at the revelation of Jesus (cf. 1 Pe. 1:13; Titus. 2:11; 1 Cor. 1:7; Gal. 1:6; etc.). - John P. Harrigan