Ephesians 1:9

That he might make known to us, and to all men, the mystery of his will and pleasure in establishing his new law, of calling all Gentiles, as well as Jews, to believe in his Son, made man for us, in the dispensation of the fulness of times, (that is, at the time decreed from eternity) to establish, to accomplish, and, as it is in the Greek, to recapitulate all things in heaven and on earth, in Christ, and through him, and his merits; on earth, by fulfilling all the types, figures, and prophecies concerning the Messias; and in heaven, by filling up the number of his elect. (Witham) --- The mystery of his will. The word mystery signifies a secret, an unknown design. It was the will of God, to reveal to us the great design he had in the incarnation of his Son, viz. the formation of one great body of true adorers; composed, without distinction, of Jew and Gentile: till (ver. 10) when the time appointed shall come, he will reunite and perfect in or under Christ this one body, composed of the Church triumphant, Angels and saints in heaven, and the Church militant upon earth. (St. John Chrysostom, Estius, &c.)

Which he hath purposed in him; [2] i.e. in Christ: but in the Greek the sense is, in himself; i.e. in God the Father, who sent his Son. (Witham)

[BIBLIOGRAPHY]

In eo; but in the Greek, en auto, in seipso.