Shared ground
Peter explains his teaching strategy: he keeps repeating core points because repetition protects memory and steadiness. The passage explicitly says his readers already know “these things” and are established in “present truth,” yet he still considers reminders necessary (vv. 12–13). Peter also frames his life as temporary (“this tent”) and ties his urgency to the expectation of near death, which he says Jesus made clear to him (v. 14). Finally, he intends that they be able to remember “these things” always even after his “departure” (v. 15).
Where interpretation differs (only where needed)
1) What “these things” are. Many read this as the moral qualities and stability he just discussed in 1:3–11. Others think it includes the broader apostolic message he will defend next in 1:16–21. The text itself does not list the content in vv. 12–15; it points backward (“therefore”) and also forward (his coming support for the message).
2) What “present truth” means. Some take it as “the true message you currently hold,” emphasizing their settled grasp of sound teaching. Others hear a time-note: “truth suited to the present situation,” stressing that they must stay anchored amid changing pressures. Both fit the wording; the passage mainly highlights that their current stance is real, yet still needs reinforcement.
3) What “departure” implies. Many understand it as a polite way to say “death,” matching the “putting off of my tent” (vv. 14–15). A minority view sees room for “departure” as travel, but the near “putting off” language makes death the most natural reading in context.
Why the disagreement exists
The passage uses brief, referential language (“these things,” “present truth,” “departure”) without unpacking details, and it sits between a growth-focused paragraph (1:3–11) and an argument for trustworthy testimony (1:16–21). That placement invites different judgments about how wide the reminder’s content is, and whether the phrases emphasize time, situation, or teaching.
What this passage clearly contributes
This text presents remembrance as a deliberate, responsible means of preserving shared truth when leadership is fragile and time is short. It also shows that being “established” in truth does not remove the need for ongoing reminders; Peter treats stable knowledge and repeated reinforcement as complementary, not competing. The passage further frames Christian teachers as accountable for durable transmission—aiming for a community’s continuing recall even after the teacher’s death, not ongoing dependence on the teacher’s presence.