[2:6] 1 sn Revealing God’s purpose at his appointed time is a difficult expression without clear connection to the preceding, literally “a testimony at the proper time.” This may allude to testimony about Christ’s atoning work given by Paul and others (as v. 7 mentions). But it seems more likely to identify Christ’s death itself as a testimony to God’s gracious character (as vv. 3-4 describe). This testimony was planned from all eternity, but now has come to light at the time God intended, in the work of Christ. See 2 Tim 1:9-10; Titus 2:11-14; 3:4-7 for similar ideas.
[1:3] 2 tn The Greek text emphasizes the contrast between vv. 2b and 3a: God promised this long ago but now has revealed it in his own time.