The Gift of the Holy Spirit: An Earnest of the Inheritance of the Saints
Source: TTT
2 Corinthians 1:22
placed His seal on us, and put His Spirit in our hearts as a pledge of what is to come.
2 Corinthians 5:5
And God has prepared us for this very purpose and has given us the Spirit as a pledge of what is to come.
Ephesians 1:14
who is the pledge of our inheritance until the redemption of those who are God’s possession, to the praise of His glory.