We rejoice in the God of our salvation when we set the enlightened eyes of our hearts (Eph 1:18) on the LORD. The God of our salvation is the triune God, Father, Son and Holy Spirit We rejoice in God for who He is, what He has done, what He is doing and what He will do. When we set the enlightened eyes of our hearts on the LORD, exuberant joy wells up in our spirit and extends to our body. Sometimes it is silent, contemplative joy. Sometimes we speak highly of the Lord, rejoicing with one another. Many times our joy is expressed songs and hymns and spiritual songs, singing with our hearts to the Lord. Sometimes we clap our hands. Sometimes we raise our hands in adoration of God. Sometimes our mouths are filled with laughter. Sometimes we pull a David and dance before the Lord. Sometimes we shout for joy. Such rejoicing is contagious. It edifies us and pleases the Lord.
We have much to thank and praise God for and when we do it brings joy and we rejoice. As far back as I can remember, when the brothers and sisters sang a worship hymn directed to God our Father or Christ Jesus our Savior, joy welled up in my heart. For example: I Love you Lord. When we read scripture that praises God it brings joy and we rejoice. One of my favorite passages from God’s Word comes from Peter.
Let us praise the God and Father of our Lord Jesus Christ who by resurrecting Jesus Christ from the dead has in his great mercy given us a new birth so that we live in hope for an inheritance it isn’t destroyed or defiled and never fades away as it is kept for you in heaven and You by believing are protected by God’s power till you come to the salvation that is waiting to be revealed at the end of time. This delights you although now for a little while you have had to suffer various trials. Gold is tested by fire and your faith when it is tested should be found to be much more precious than gold which perishes. This is how you will have praise and glory and honor when Jesus Christ appears again.
You never saw Him, but you love Him. You don’t see Him now, but you believe in Him and a joy unspeakable and wonderful fills you with delight as you get what by faith you’re looking for−your salvation.
… and now the Holy Spirit sent from heaven, had men, telling you the good news, announce to you these things angels long to look into. 1 Peter 1:3-9,12b AAT
Each blessing of God’s love and grace has inherent present future application in our lives. We rejoice in both.
In every case there is a present-future tension, a dual relationship between part and whole. Each word indicates that for Paul salvation is not something attained all at once in this life or wholly reserved for the next; rather it speaks of something begun though not yet completed, something participated in but not yet fully possessed. In every case, too, the Spirit is the decisive factor determining this tension and relationship. The Spirit gives life in the present (2 Co 3:6) and will effect the resurrection of the body in the future. (Ro 8:11), for the Spirit is life for the Christian (Ro 8:10). The Spirit is the arrabōna [pledge] of this ultimate transformation (2 Co 5:5) as he is the aparchēn [first-fruit] of the ultimate redemption (Ro 8:23). The Spirit effects a right relationship with God by his coming (1 Co 6:11), for the promise of the Spirit and the blessing of justification are two sides of the same coin (Gal 3:1-14); at the same time it is through the Spirit that Christians wait for the hope of righteousness (Gal 5:1). Christians are saved through the washing of regeneration and renewal effected by the Spirit (Tit 3:5), the very Spirit whose coming into their lives makes them sons (Ro 8:15). It is this present experience of the Spirit which gives them the sure hope that their salvation and sonship will be perfected in glory in the end through the same Spirit (Ro 8:22-24; cf. Gal 3:2 with Php 1:6), for it is the same Spirit who even here and now is in process of transforming them into the very image of the Lord from one degree of glory to another (a Co 3:18). In short, the present-future tension is a function of the Spirit; the Spirit himself is the part now enjoyed of the whole yet to be realized; the Spirit operates the process leading to perfection, the fulfilled Now which works for the consummated Yet to be. Spirit and Kingdom by James D. G. Dunn
Father God, we rejoice in You, for by your grace we are saved and we rejoice that we are kept by Your power through faith unto salvation ready to be revealed in the last time. See present: Eph 2:4-5; 1 Cor 1:18; 1 Cor 15:1-2 Future: Heb 1:14; Heb 9:27-28
And cried with a loud voice, saying, Salvation to our God which sitteth upon the throne, and unto the Lamb. Rev 7:10
And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night. Rev 12:10
And after these things I heard a great voice of much people in heaven, saying, Alleluia; Salvation, and glory, and honour, and power, unto the Lord our God: Rev 19:1
Now the Lord is the Spirit, and where the Spirit of the Lord is, there is freedom. 18We all, with unveiled faces, are looking as in a mirror at the glory of the Lord and are being transformed into the same image from glory to glory; this is from the Lord who is the Spirit. 2 Cor 3:17-18 HCSB