Q. 29. How are we made partakers of the redemption purchased by Christ?
A. We are made partakers of the redemption purchased by Christ by the effectual application of it to us by his Holy Spirit.
“But when the goodness and loving kindness of God our Savior appeared, he saved us, not because of any works of righteousness that we had done, but according to his mercy, through the water of rebirth and renewal by the Holy Spirit. This Spirit he poured out on us richly through Jesus Christ our Savior, so that, having been justified by his grace, we might become heirs according to the hope of eternal life.” (Titus 3:4-7, NRSV)
The gospel life isn't something we learn ABOUT and then put together with instructions from the manufacturer; it's something we BECOME as God does his work of creation and salvation in us and as we accustom ourselves to a life of belief and obedience and prayer. - Eugene Peterson in Leap Over a Wall, quoted in Christianity Today, March 1, 1999, 64.
Are you worried because you find it so hard to believe? No one should be surprised at the difficulty of faith, if there is some part of his life where he is consciously resisting or disobeying the commandments of Jesus. Is there some part of your life which you are refusing to surrender at his behest? Some sinful passion, maybe, or some animosity, some hope, perhaps your ambition or your reason? If so, you must not be surprised that you have not received the Holy Spirit, that prayer is difficult, or that your request for faith remains unanswered. Go, rather, and be reconciled with your brother, renounce the sin which holds you fast - and then you will recover your faith! If you dismiss the word of God's command, you will not receive his word of grace. How can you hope to enter into communion with him when at some point in your life you are running away from him? The man who disobeys cannot believe, for only he who obeys can believe. —Dietrich Bonhoeffer, The Cost of Discipleship (New York: The Macmillan Company, 1963), 72-73.
Faith is both a free gift of God and the free assent of our will to the whole truth that God has revealed. To live, grow, and persevere in the faith to the end, we must nourish it with the word of God. The Lord gives us his Holy Spirit to enlighten our minds that we may grow in his truth and in the knowledge of his great love for each of us. For the apostle Paul, there is an intimate connection between the Spirit and the historic/risen Jesus who is the exalted Lord. For Paul, there is no experience of Jesus apart from the Spirit. The Spirit is the “Spirit of Jesus Christ” for Paul (Phil. 1:19) for “no one can say ‘Jesus is Lord’ except by the Holy Spirit” (1 Cor. 12:3)