The prophecy in the Scriptures did not come from man's opinion.

[jidong xiao]

二十至二十一节证明申言者的话全然可信可靠。经上的豫言不是来自人的意见。这豫言是神的话，神的说话。为这缘故，我们该信旧约里所豫言的。彼得在这里似乎说，“圣经里的豫言真正是出于神，所以是可靠的。不要听背道者异端的教训，他们乃是偏离了神圣真理的道路。反之，你该留意旧约的豫言，也该持守我们的见证。”

如我们所要看见的，在二章一节彼得说，“从前在百姓中有假申言者，照样，在你们中间，也必有假教师，偷着引进毁坏人的异端，连买他们的主也不承认，自取速速的毁坏。”这里彼得说，从前在百姓中有假申言者，将来在信徒中间也必有假教师。这些假教师必引进毁坏人的异端。彼得在一章末了的话引导他在二章接着说到背道。彼得的负担是要使信徒能豫防这背道。

Verses 20 and 21 prove that the prophetic word is altogether reliable and trustworthy. The prophecy in the Scriptures did not come from man's opinion. This prophecy is God's word, God's speaking. For this reason, we should believe whatever is prophesied in the Old Testament. Peter seems to be saying here, "The prophecy in the Bible is genuinely of God. Therefore, it is trustworthy. Do not listen to the heretical teachings of the apostates, of those who have deviated from the track of divine truth. Instead, you should give heed to the prophecies of the Old Testament and also hold to our testimony." 

As we shall see, in 2:1 Peter says, "But there arose also false prophets among the people, as also among you there will be false teachers, who will secretly bring in destructive heresies, even denying the Master who bought them, bringing upon themselves swift destruction." Here Peter says that there were false prophets among the people in times past and that in the future there will be false teachers among the believers. These false teachers will bring in destructive heresies. Peter's word at the end of chapter one leads him to go on to speak of apostasy in chapter two. Peter's burden was to inoculate the believers against this apostasy.