by Herman Bavinck
“ Fellowship with the Holy Spirit (2 Cor. 13:14), and secondarily with each other (1 John 1:7; 1 Cor. 12:12-31; Eph. 1:22-23; 4:16). The purpose of human life is fellowship with God; to live in Him is life's goal. The spiritual life is to live in fellowship with the Triune God—that is, in the Holy Spirit, through Christ, with the Father. This fellowship is one—that is, divine—and yet different with respect to the three Persons. First there is the fellowship of the Holy Spirit convicting of sin, righteousness, and judgment; then, that of Christ adopting us and granting us His benefits; thereafter that of the Father adopting us as His children in and because of Christ. The spiritual life always moves among those three Persons and is therefore a genuinely rich life, rich in diversity, without monotony. The believer experiences the life of God Himself: from the Father through the Son in the Spirit and, conversely, in the Spirit through the Son to the Father. The spiritual life is therefore a life of God (Eph. 4:18), a life that originates from God, is granted by grace, unites us with God, is worked in us immediately through the Holy Spirit, and has the spiritual life of God Himself as model and example. The spiritual life of believers is a shadow, an impression of the most perfect life of God Himself, so that it is said that they share in the divine nature (2 Peter 1:4).
—Herman Bavinck, Reformed Ethics, p. 250.