Yea, I think it meet, or right. He expresses more clearly how useful and how necessary is admonition, because it is needful to arouse the faithful, for otherwise torpor will creep in from the flesh. Though, then, they might not have wanted teaching, yet he says that the goads of admonitions were useful, lest security and indulgence (as it is usually the case) should weaken what they had learned, and at length extinguish it. He adds another cause why he was so intent on writing to them, because he knew that a short time remained for him. "I must diligently employ my time," he says; "for the Lord has made known to me that my life in this world will not be long." We hence learn, that admonitions ought to be so given, that the people whom we wish to benefit may not think that wrong is done to them, and also that offenses ought to be so avoided, that yet the truth may have a free course, and exhortations may not be discontinued. Now, this moderation is to be observed towards those to whom a sharp reproof would not be suitable, but who ought on the contrary to be kindly helped, since they are inclined of themselves to do their duty. We are also taught by the example of Peter, that the shorter term of life remains to us, the more diligent ought we to be in executing our office. It is not commonly given to us to foresee our end; but they who are advanced in years, or weakened by illness, being reminded by such indications of the shortness of their life, ought to be more sedulous and diligent, so that they may in due time perform what the Lord has given them to do; nay, those who are the strongest and in the flower of their age, as they do not render to God so constant a service as it behooves them to do, ought to quicken themselves to the same care and diligence by the recollection of approaching death; lest the occasion of doing good may pass away, while they attend negligently and slothfully to their work. At the same time, I doubt not but that it was Peter's object to gain more authority and weight to his teaching, when he said that he would endeavor to make them to remember these things after his death, which was then nigh at hand. For when any one, shortly before he quits this life, addresses us, his words have in a manner the force and power of a testament or will, and are usually received by us with greater reverence.

Yea, I think it meet - I think it becomes me as an apostle. It is my appropriate duty; a duty which is felt the more as the close of life draws near.
As long as I am in this tabernacle - As long as I live; as long as I am in the body. The body is called a tabernacle, or tent, as that in which the soul resides for a little time. See the notes at 2-Corinthians 5:1.
To stir you up, by putting you in remembrance - To excite or arouse you to a diligent performance of your duties; to keep up in your minds a lively sense of Divine things. Religion becomes more important to a man's mind always as he draws near the close of life, and feels that he is soon to enter the eternal world.

As long as I am in this tabernacle - By tabernacle we are to understand his body; and hence several of the versions have σωματι, body, instead of σκηνωματι, tabernacle. Peter's mode of speaking is very remarkable: as long as I AM in this tabernacle, so then the body was not Peter, but Peter dwelt in that body. Is not this a proof that St. Peter believed his soul to be very distinct from his body? As a man's house is the place where he dwells, so the body is the house where the soul dwells.

Yea, I think it meet, as long as I am in this (k) tabernacle, to stir you up by putting [you] in remembrance;
(k) In this body.

Yea, I think it meet,.... Or "just". This is the apostle's other reason for his conduct, taken from the duty of his place and office; judging it to be what became him as an apostle and elder, and the minister of the circumcision, and was what was due to God and Christ, whom he served, and the souls of men under his care:
as long as I am in this tabernacle: or "body", as the Syriac and Ethiopic versions render it, and so some copies; for the body is as a tabernacle for the soul to dwell in, pitched for a time, and, ere long, to be taken down; See Gill on 2-Corinthians 5:1,
to stir you up; to the lively exercise of grace, and constant performance of duty: by putting you in remembrance: of the said things; for saints are apt to be forgetful of their duty, and backward to it, and sluggish and slothful in it.

Yea--Greek, "But"; though "you know" the truth (2-Peter 1:12).
this tabernacle--soon to be taken down (2-Corinthians 5:1): I therefore need to make the most of my short time for the good of Christ's Church. The zeal of Satan against it, the more intense as his time is short, ought to stimulate Christians on the same ground.
by--Greek, "in" (compare 2-Peter 3:1).

In this tabernacle - Or tent. How short is our abode in the body! How easily does a believer pass out of it!