In Ephesians 1 I assume you are pretaining to this passage : According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love: "Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will, Eph 1:4-5.

Let me give you a commentary from John Wesley on this : Eph 1:4 - As he hath chosen us - Both Jews and gentiles, whom he foreknew as believing in Christ, Eph 1:5 - Having predestinated us to the adoption of sons - Having foreordained that all who afterwards believed should enjoy the dignity of being sons of God, and joint - heirs with Christ. According to the good pleasure of his will - According to his free, fixed, unalterable purpose to confer this blessing on all those who should believe in Christ, and those only.

With this statement Paul is making I agree with Wesley in the fact that God has Predestines us to be his sons AFTER we have believed.