1This is now, beloved, the second letter that I have written to you; and in both of them I stir up your sincere mind by reminding you 2that you should remember the words which were spoken before by the holy prophets and the commandment of us, the apostles of the Lord and Savior, 3knowing this first, that in the last days mockers will come, walking after their own lusts 4and saying, “Where is the promise of his coming? For, from the day that the fathers fell asleep, all things continue as they were from the beginning of the creation.” 5For they willfully forget that there were heavens from of old, and an earth formed out of water and amid water by the word of God, 6by which means the world that existed then, being overflowed with water, perished. 7But the heavens that exist now and the earth, by the same word have been stored up for fire, being reserved against the day of judgment and destruction of ungodly men.
8But don’t forget this one thing, beloved, that one day is with the Lord as a thousand years, and a thousand years as one day. 9The Lord is not slow concerning his promise, as some count slowness; but he is patient with us, not wishing that anyone should perish, but that all should come to repentance. 10But the day of the Lord will come as a thief in the night, in which the heavens will pass away with a great noise, and the elements will be dissolved with fervent heat; and the earth and the works that are in it will be burned up. 11Therefore, since all these things will be destroyed like this, what kind of people ought you to be in holy living and godliness, 12looking for and earnestly desiring the coming of the day of God, which will cause the burning heavens to be dissolved, and the elements will melt with fervent heat? 13But, according to his promise, we look for new heavens and a new earth, in which righteousness dwells.
14Therefore, beloved, seeing that you look for these things, be diligent to be found in peace, without defect and blameless in his sight. 15Regard the patience of our Lord as salvation; even as our beloved brother Paul also, according to the wisdom given to him, wrote to you, 16as also in all of his letters, speaking in them of these things. In those, there are some things that are hard to understand, which the ignorant and unsettled twist, as they also do to the other Scriptures, to their own destruction. 17You therefore, beloved, knowing these things beforehand, beware, lest being carried away with the error of the wicked, you fall from your own steadfastness. 18But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be the glory both now and forever. Amen.
Apostles (Gk. ἀπόστολος, apostolos). (9:10, Mat 10:2, Mark 6:30, Luke 2:37, 9:27, 15:22, Rom 16:7, 1 Cor 12:28, 2 Cor 12:11, Gal 1:17, Eph 4:11, 1Thess 2:6, 2 Pet 3:2, Jude17, Rev 2:2, 18:20) Strong’s 652
It was Jesus who first called the disciples “apostles” (Luke 6:13). This word is a compound noun formed from the preposition ἀπό (apo), “from, away” and the verb στέλλω (stello), “to send,” so the word means one who is sent. The predominant use of this word in the NT is in a special sense, for that group of honored believers, sent by Christ to preach the gospel and provide leadership for His people. There seem to be only a few apostles: the original twelve, Matthias (Acts 1:26) and Paul (Rom 1:1; 1 Cor 15:8). The requirement of an apostle is to have been with Jesus from the beginning of His ministry (Acts 1:21–23) through the resurrection (with Paul as the exception), and to be able to do the miracles of an apostle (2 Cor 2:12; Heb 2:4). After the ascension of Jesus and the beginning of the church, the apostles were seen as functioning in an apostolic office (Eph 4:11) needed in the beginning, foundational days of the church (Eph 2:2). Paul was the last true apostle appointed. Most importantly, the apostles were called and sent to influence people to influence others toward Christ.