Augustine of Hippo

Peter, in his second epistle, urged us to holiness in living and character, declaring that this world would pass. New heavens and a new earth are expected which will be given to the just to inhabit.… Some people had used certain obscure passages from Paul's writings in order to excuse their lack of concern to live well, on the ground that they were secure in their salvation. Peter was saying that some of the things which Paul said are hard to understand and that these people were twisting them to their own ruin.