[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.
[6:12] 2 tn This phrase literally means “compete in the good competition of the faith,” using words that may refer to a race or to a boxing or wrestling match: “run the good race” or “fight the good fight.” The similar phrase in 1 Tim 1:18 uses a military picture and is more literally “war the good warfare.”
[6:12] 3 sn At some point in Timothy’s life, he publicly acknowledged Jesus as the resurrected Lord, perhaps either at his baptism or his ordination as a minister of the gospel. With this reminder of the historical moment of his good confession, Timothy is encouraged to remain steadfast in his faith and to finish his life as a minister in the same way it began (see G. W. Knight, Pastoral Epistles [NIGTC], 264-65).
