So no reason ? That explains why your struggling to account for it . Where as from our vantage there is purpose and reason for Predestination and Election . We are explaining why Paul is saying what he is saying . There is something Paul wants them to know and its not arbitrary .Being told you are predestined to the Adoption is the basis for eternal security. The Holy Spirit guarantee s this by the sealing until the day of redemption. There is no assurance ultimately outside of this.