At the time of his calling to be a Disciple of Christ, Peter was a fisherman. Later, as an apostle (which means nothing more than "one sent" - see Apostle), Peter, and all the others, preached the coming Kingdom of God, which is the focus of all Prophecy. Peter was also given to personally fulfill a prophecy of Christ, Peter's own execution by crucifixion: "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. 21:19 This spake he, signifying by what death he should glorify God" (John 21:18-19 KJV).
"Knowing that shortly I must put off this my tabernacle, even as our Lord Jesus Christ hath showed me"
At the time of the writing of this epistle, Peter knew that his ministry (see Peter's Ministry) was nearly complete: "1:14 Knowing that shortly I must put off this my tabernacle, even as our Lord Jesus Christ hath showed me. 1:15 Moreover I will endeavour that ye may be able after my decease to have these things always in remembrance" (2 Peter 1:14-15 KJV).
"1:1 Simon Peter, a servant and an Apostle of Jesus Christ, to them that have obtained like precious faith with us through the righteousness of God and our Saviour Jesus Christ:
Peter, and all of the other true servants of God, never "interpretted" prophecy: "1:20 Knowing this first, that no prophecy of the scripture is of any private interpretation.1:21 For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost" (2 Peter 1:20-21 KJV). They simply taught what was written: "1:16 For we have not followed cunningly devised fables, when we made known unto you the power and coming of our Lord Jesus Christ" (2 Peter 1:16 KJV).
"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. 1:13 Yea, I think it meet, as long as I am in this tabernacle [i.e. a tent; a temporary, portable dwelling - see also Christ's Feast of Tabernacles] to stir you up by putting you in remembrance; 1:14 Knowing that shortly I must put off this my tabernacle, even as our Lord Jesus Christ hath showed me. 1:15 Moreover I will endeavour that ye may be able after my decease to have these things always in remembrance.
Fact Finder: When did Peter and the other apostles fully understand Christ's teachings?