25. Now to him that is of power—more simply, as in Jude 24, "to Him that is able."
to stablish—confirm, or uphold
you, according to my gospel, and the preaching of Jesus Christ—that is, in conformity with the truths of that Gospel which I preach, and not I only, but all to whom has been committed "the preaching of Jesus Christ."
according to the revelation of the mystery—(See on Ro 11:25).
which was kept secret since the world began—literally, "which hath been kept in silence during eternal ages."