Being among those who had “advance knowledge, ” Peter knew that in the last days, Christians would have to be especially on guard in order to maintain their integrity.
وَقَدْ أَوْضَحَ ٱلرَّسُولُ يُوحَنَّا ٱلسَّبَبَ فِي وَقْتٍ لَاحِقٍ .‏