"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." (Ephesians 1:4)"According as," looks back to verse 3, of Ephesians one, and the words "hath blessed." These words speak of a past action on God's part, in which He bestows the blessing of being chosen in Christ before the world began. Plainly, Paul says, "The salvation of the elect from their utter ruin has for its foundation the eternal and gracious choice of the Sovereign God." The Greek word from which the English term "hath chosen" comes, literally means, "to mark off" or "select out" for one's own self. "According as," or in conformity with the Divine choice, the believer's blessings issue forth.
(Sovereign Grace Advocate - June, 1981)