2Pe 1:20 Knowing this first, that no prophecy of the scripture is of any private interpretation.
2Pe 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.(KJV)
2Pe 1:20 Knowing this in the first place, that all scriptural prophecy is not from any man's own suggestions.
2Pe 1:21 For prophecy in old time came not by the will of man: but the holy men of God spake under the impulse of the Holy Ghost..(1795 Thomas Haweis)
2Pe 1:20 knowing this first, that no prophecy of Scripture comes from one's own interpretation.
2Pe 1:21 For not by the will of man was prophecy ever brought, but men from God spoke, being moved by the Holy Spirit.(NT 1918 Anderson)
Knowing this first, that no prophecy of scripture at all is becoming its own explanation."
2Pe 1:21 For not by the will of man was prophecy carried on at any time, but, being carried on by holy spirit, holy men of God speak."(CLV)
2Pe 1:20 knowing this first, that [the scope of] no prophecy of scripture is had from its own particular interpretation,
2Pe 1:21 for prophecy was not ever uttered by [the] will of man, but holy men of God spake under the power of [the] Holy Spirit.(Darby 1890)
2Pe 1:20 this first knowing, that no prophecy of the Writing doth come of private exposition,
2Pe 1:21 for not by will of man did ever prophecy come, but by the Holy Spirit borne on holy men of God spake.(YLT)
PRIVATE: G2398 idios pertaining to self, that is, one's own; by implication private or separate
INTERPRETATION: G1955 epilusis explanation, that is, application: - interpretation. G1955 epiluō to solve further, that is, (figuratively) to explain, decide: - determine, expound. From G3089 luō A primary verb; to "loosen" (literally or figuratively): - break (up), destroy, dissolve, (un-) loose, melt, put off.
This is the understanding the Lord has given me through study and the help of other messengers. Man must not take a verse of scripture and attempt to explains its meaning without that scripture have a witness of at least 2.
Mat 18:16 and if he may not hear, take with thee yet one or two, that by the mouth of two witnesses or three every word may stand.
Rev 11:3 And I will give unto my two witnesses, that they shall prophesy, a thousand two hundred and sixty days, arrayed in sackcloth.
What that reveals to me and should to any one called, with the hope to be chosen, that when any verse of scripture is read, that word needs the witness of 2 or more to establish its validity.
This is my understanding of what Peter was teaching. Should I not be led to find 2 witnesses to confirm my understanding and intrepetation, then it is mine and of no real value.