en_tn/eph/01/13.md

It was by Christ that you also heard the word of truth

AT: "it was through believing in Christ that you heard that you were saved by him"

the gospel of your salvation by Christ

AT: "Christ is the gospel of your salvation"

in whom you also have believed

AT: "and you also have believed in Christ"

were sealed with the promised Holy Spirit

As wax was placed on a letter and impressed with a symbol representing who sent the letter, God sealed our salvation with the Holy Spirit signifying his ownership of us. (See: rc://en/ta/man/translate/figs-metaphor)

the spirit is the guarantee

God gave us the Holy Spirit as a promise of his gift of eternal life at the proper time. AT: "the Holy Spirit is a pledge"

our redemption of the possession

God has purchased us to be his own people. AT: "that is, that God forgives us and accepts us as his own people"