These are some good thoughts about God's relationship to sin, judgment, and time from 2 Peter 3:8-9.
"This then seems to be the Apostle Peter's answer to the Christian who is troubled about the conditions, and who sometimes is tempted to query and question with regard to the delay. Remember that we are dealing with God and not with man. Remember his eternity. Remember his relationship to time. Remember the utter righteousness and holiness of God. Remember His love, His mercy, His compassion. We are in time, and let us confess it, we are far too much like James and John. You remember our Lord sent them one day to prepare His way for Him. They went into a city of the Samaritans who would not receive them, and you remember how James and John said unto our Lord, 'Shall we call down fire from heaven to consume and destroy them?' If you and I controlled this world, no doubt it would be like that -- we would bring in immediate judgment. But the reply was, 'Ye know not what manner of spirit ye are of, for the Son of man is not come to destroy men's lives but to save them.' 'The Lord is not slack', but He does not wish that any should perish, but that all should come in this blessed knowledge of salvation. Let us then submit unto God and His absolute wisdom, and especially to His love and mercy, His long-suffering and compassion."
D. M. Lloyd-Jones commenting on 2 Peter 3:8-9 in 2 Peter (Carlisle PA: The Banner of Truth Trust, 1983), p. 183.