¹ tn Grk “be knowing this.” See also 2 Pet 1:20 for a similar phrase: τοῦτο πρῶτον γινώσκοντες (touto prwton ginwskonte").

¹ tn Grk “knowing this [to be] foremost.” Τοῦτο πρῶτον (touto prwton) constitute the object and complement of γινώσκοντες (ginwskonte"). The participle is dependent on the main verb in v. 19 (“you do well [if you pay attention]”), probably in a conditional usage. An alternative is to take it imperativally: “Above all, know this.” In this rendering, πρῶτον is functioning adverbially. Only here and 2 Pet 3:3 is τοῦτο πρῶτον found in the NT, making a decision more difficult.

⁴ sn Holy prophets…apostles. The first chapter demonstrated that the OT prophets were trustworthy guides (1:19-21) and that the NT apostles were also authoritative (1:16-18). Now, using the same catch phrase found in the Greek text of 1:20 (τοῦτο πρῶτον γινώσκοντες, touto prwton ginwskontes), Peter points to specific prophecies of the prophets as an argument against the false teachers.

¹ tc Most witnesses (א* L W^s Ï) read πρῶτος (prwtos) here instead of πρῶτον (prwton). The former reading would be a predicate adjective and suggest that Andrew “was the first” person to proselytize another regarding Jesus. The reading preferred, however, is the neuter πρῶτον, used as an adverb (BDAG 893 s.v. πρῶτος 1.a.β.), and it suggests that the first thing that Andrew did was to proselytize Peter. The evidence for this reading is early and weighty: Ì^66,75 א² A B Θ Ψ 083 Ë^1,13 892 al lat.

¹ tc The majority of mss (א² B C³ Ψ Ï) read πρῶτον (prwton, “first”) here in conjunction with this verb: “he first descended.” The shorter reading, which lacks πρῶτον, should be considered original on the basis of both external and internal evidence: It has strong external support from the Alexandrian and Western texttypes (Ì⁴⁶ א* A C* D F G I^vid 082 6 33 81 1739 1881 pc); internally, the inclusion of πρῶτον is most likely an addition to clarify the sense of the passage.

¹ tn Grk “knowing this [to be] foremost.” Τοῦτο πρῶτον (touto prwton) constitute the object and complement of γινώσκοντες (ginwskonte"). The participle is loosely dependent on the infinitive in v. 2 (“[I want you] to recall”), perhaps in a telic sense (thus, “[I want you] to recall…[and especially] to understand this as foremost”). The following statement then would constitute the main predictions with which the author was presently concerned. An alternative is to take it imperativally: “Above all, know this.” In this instance, however, there is little semantic difference (since a telic participle and imperatival participle end up urging an action). Cf. also 2 Pet 1:20.