Jesus and His Father give us a guarantee of His promise to marry us. On the Feast of Pentecost (Acts 2), fifty days after Jesus' resurrection, God sent a "deposit," the "earnest" of the Holy Spirit—the guarantee of the full payment to come later, when we are changed from flesh to spirit. There may be more here than some realize.
The Greek word for "earnest" is arrabon. When taken in the context of our understanding of a glorious wedding coming, it is a word packed with meaning. Vine's Expository Dictionary of New Testament Words comments:
Originally, "earnest-money" deposited by the purchaser and forfeited if the purchase was not completed, [arrabon] was probably a Phoenician word, introduced into Greece. In general usage it came to denote "a pledge" or "earnest" of any sort; in the NT it is used only of that which is assured by God to believers; it is said of the Holy Spirit as the divine "pledge" of all their future blessedness, . . . particularly of their eternal inheritance.
Then comes this final sentence: "In modern Greek arrabona is an 'engagement ring.'" Of course! It makes so much sense. When Jesus asks us to drink of His cup—and we do—He follows by giving us a sign of His pledge: a kind of engagement ring, an earnest of His Holy Spirit! All this happened on the likely anniversary of God's proposal to Israel, the Day of Pentecost, about the time Boaz and Ruth pledged their troth.
Will You Marry Me? (Part Two)