who is a pledge given in advance [adjectival relative clause relating to the Spirit] of our inheritance [the first of a series of linked phrases describing the inheritance mentioned before] to the redemption [second in the series] of the purchased possession [third in the series. …
Redemption Gems
Bible Gem 618 – Redemption through His blood (Eph 1:7)
in Whom we have redemption [the relative pronoun refers back to that loved Son, the source of redemption] through His blood [the means whereby that redemption is even possible] the forgiveness of sins [this noun phrase just sits there at the end of the string …