For beloved see comments on Jude JUD.1.3.

But do not ignore this one fact recalls verse 5 and deliberately contrasts the attitude of the false teachers with the attitude that the readers of this letter should have. Ignore translates the same word in both verses: in verse 5 the false teachers are accused of deliberate ignorance or neglect; in verse 8 the readers are urged not to do this. Furthermore, in the Greek the plural pronoun “you” is used in verse 8 and placed in the emphatic position, “don’t you ignore,” thus contrasting it with “they” in verse 5; the sense is something like “you yourselves must not do what these false teachers deliberately do.”

Since ignore translates the same word found in verse 5, the interpretation of this word in verse 5 will affect the way it is interpreted in verse 8. It may therefore be advisable to use the same word in both verses in order to reflect this relationship. This is in fact done in many translations: Revised Standard Version ignore, Jerusalem Bible “forget,” New English Bible “lose sight of.”

With the Lord may be rendered as “the way that the Lord thinks” or “the way that the Lord reckons things.”

With the Lord one day is as a thousand years …: the delay of the Parousia can be explained by the fact that the Lord’s way of reckoning time is different from human reckoning and does not conform to human ways of thinking. The statement in this verse is based on Psa 90.4, “A thousand years to you are like one day” (Good News Bible). Most commentaries take the statement to mean that what may seem long to us as people may in fact be short to God, and what may seem short to us may in fact be long to him.

And a thousand years as one day: the repetition of the statement (but in reverse) needs to be noted. Some commentaries and translations take this repetition to be simply stylistic and regard the two parts as parallel to each other. This is the position reflected in Good News Translation “There is no difference in the Lord’s sight between one day and a thousand years; to him the two are the same.” Others take this as emphasizing that on the one hand God is able to act quickly to fulfill his promises (as in verse 10), while on the other hand he gives sufficient time for people to repent (as in verse 9), although for the unrepentant the time is too brief. If this second position is taken, then the two parts of the statement need to be retained in translation. It seems likely, however, that the stylistic interpretation is to be preferred.

Quoted with permission from Arichea, Daniel C. and Nida, Eugene A. A Handbook on The Second Letter from Peter. (UBS Handbook Series). New York: UBS, 1980. For this and other handbooks for translators see here .