2 Peter 1:10-15

2Pe 1:10 Wherefore the rather, brethren, give diligence to make your calling and election sure:  He doesn’t say to ensure your calling or election, for these are the work of the Godhead, but rather to make sure you understand your position in that calling, and to behave as if you are elect, reminding oneself of the price paid to bring you to the new state and condition, and that such is not to be treated as if it were a pittance paid, but rather the most expensive price ever. 

for if ye do these things, ye shall never fall:  Not fall from grace eternally, for we know that’s an impossibility.  But here a diligence to do things keeps you from falling away from the service and worship of God.  Such a fall would mean a return to the world, or an acceptance of false doctrine, and those falling are deprived of the joys enumerated in the kingdom of God. 

2Pe 1:11 For so an entrance shall be ministered unto you abundantly into the everlasting kingdom of our Lord and Saviour Jesus Christ.  This is a hard verse.  If we see the everlasting kingdom as eternal heaven, we put the covenant of election at risk of error in other scriptures, suggesting timely or worldly action can open heaven’s portals.  We know that cannot be so.  That leaves the everlasting kingdom being the church, the kingdom Daniel was told would never end.  That being the case, the entrance thereunto is wide and easy for someone who appreciates the covenant of grace.  On the other hand, those who have been indoctrinated in the works system of salvation, entering the kingdom is a difficult thing, requiring one to put aside self and give God all the honor and glory for the work He has done.  One might describe it as requiring violence in subduing the fleshly nature. 

Mat 11:12 And from the days of John the Baptist until now the kingdom of heaven suffereth violence, and the violent take it by force.   

Trying to bring someone to the truth after they have been indoctrinated by a false gospel is a battle that takes some violence in knocking down their old strongholds. 

2Pe 1:12 Wherefore I will not be negligent to put you always in remembrance of these things, though ye know them, and be established in the present truth.  Peter calls it the present truth.  The doctrine and understanding you have now, confirmed by the Apostle, is the truth of the grace of God.  These are young enough assemblies that they have not yet been corrupted by the world and false teachers.  Thus, this confirmation should encourage them to keep them in memory, as Paul teaches: 

Heb 2:1 Therefore we ought to give the more earnest heed to the things which we have heard, lest at any time we should let them slip. 

The use of the term ‘present truth’ also should serve as warning against any newly revealed future truth. 

2Pe 1:13  Yea, I think it meet, as long as I am in this tabernacle, to stir you up by putting you in remembrance; Peter’s goal in the remainder of his days is to encourage and educate his brothers and sisters in Christ. 

2Pe 1:14   Knowing that shortly I must put off this my tabernacle, even as our Lord Jesus Christ hath shewed me.  Peter was shown in by the Lord that he would live to be old.  Jhn 21:18 Verily, verily, I say unto thee, When thou wast young, thou girdedst thyself, and walkedst whither thou wouldest: but when thou shalt be old, thou shalt stretch forth thy hands, and another shall gird thee, and carry thee whither thou wouldest not. Now in that season of death, this could be what he means by Jesus Christ hath shewed me. The possibility of private revelation to Peter also exists, but there is nothing to confirm that. 

2Pe 1:15  Moreover I will endeavour that ye may be able after my decease to have these things always in remembrance.  Peter’s concern for the flock will continue long after they have read this letter.  A more subtle warning than the one Paul gave:  Act 20:29 For I know this, that after my departing shall grievous wolves enter in among you, not sparing the flock.