Jesus is not indifferent, unconcerned or unable to fulfill His promise. He knows after He returns there will be no opportunity for salvation. His so-called delay “as some count slowness” (2 Pet. 3:9) is a token of His mercy – giving people just a little more time to repent and trust Him. Jesus is being patient for His enemies to come to repentance. It was the same before His judgment with water. “When the patience of God kept waiting in the days of Noah” (1 Pet. 3:20). God is always looking to show mercy to the guilty (cf. Eze. 33:11).