In Ephesians 1:13, 14, Paul tells in brief the conversion story of his readers. What are the steps in that story?

 In exploring the importance of the Holy Spirit in the lives of believers, Paul uses two images or metaphors for the Spirit. He first pictures the Holy Spirit as a “seal,” identifying a sealing presence of the Spirit that occurs from the time of conversion. In ancient times, seals were used for a wide variety of functions: to authenticate copies of laws and agreements, to validate the excellence or quantity of a container’s contents (e.g., Ezek. 28:12), or to witness transactions (e.g., Jer. 32:10-14, 44), contracts, letters (e.g., 1 Kings 21:8), wills, and adoptions. Imprinted on an object, a seal announced both ownership and protection. The presence of the Holy Spirit in their lives marks believers as belonging to God and conveys God’s promise to protect them (compare Eph. 4:30). They have been “sealed with the promised Holy Spirit” (Eph. 1:13, ESV).

 “Paul plainly states that at the moment one gives his/her life to Jesus and believes in Him the Holy Spirit seals (Greek verb: sphragizo) that believer in Christ for the day of redemption. Wonderful liberating and reassuring truth! The Spirit of God marks Christ’s followers with the seal of salvation right when they first believe.” — Jirí Moskala, “Misinterpreted End-Time Issues: Five Myths in Adventism,” Journal of the Adventist Theological Society, vol. 28, no. 1 (2017), p. 95.

 The second image Paul uses for the Holy Spirit is that of “guarantee.” The Holy Spirit is the guarantee of our inheritance, which looks toward the moment when the inheritance is to be given in full (compare 2 Cor. 1:22, 2 Cor. 5:5).

 The word translated “guarantee” (arrabon) was a Hebrew loan word that was used widely in the common or Koine Greek of New Testament times to indicate a “first installment,” “deposit,” or “down payment” that requires the payer to make additional payments.

 Note that believers do not pay this down payment but receive it from God. The treasured presence of the Holy Spirit in the lives of believers, says Paul, is a first installment of the full inheritance of salvation and redemption that will come with the return of Christ. Our job is to receive with a grateful and submissive heart what we have been offered in Jesus.