This is the patient love of God. He is stubborn about the salvation of sinners. He will not be rushed even if his name is mocked, and the trustworthiness of his promises are called into question.
He begins the letter with grace and peace (2 Pet 2:1) - gifts that had been given them by God through the righteousness of his Son, Jesus Christ, their Lord, and Master.
After the glory of our flesh has gone the way of wilted grass and faded flowers, and we’ve long forgotten all our efforts at self-justification, the word of the Lord remains.