2 Peter 3:8 But do not overlook this one fact, beloved, that with the Lord one day is as a thousand years, and a thousand years as one day. 9 The Lord is not slow to fulfill his promise as some count slowness, but is patient toward you, not wishing that any should perish, but that all should reach repentance. 10 But the day of the Lord will come like a thief, and then the heavens will pass away with a roar, and the heavenly bodies will be burned up and dissolved, and the earth and the works that are done on it will be exposed. [ESV]
“Man ceases to be in any sense a pilgrim [if] there is nowhere to which he can make pilgrimage. He must simply drift in a kind of lostness, coming from nowhere and on the way to nowhere.”a
The Day of the Lord is an unspecified period of time that stretches between two well defined points; creation and a new heaven and a new earth. Those are the boundaries of the time of pilgrimage for everyone, believer or nonbeliever. The difference is where you begin and where you end. “The Lord is not slow to fulfill his promise as some count slowness, but is patient…not wishing that any should perish, but that all should reach repentance.”
The pilgrimage of a follower of Jesus Christ begins at the point of becoming a new “creation.” The unspecified period of time is the life of faith that weaves the pilgrim into the strength of a cord that is “not easily broken.” The reward of the pilgrimage is found in the Day of the Lord – a new heaven and a new earth.
a William Barclay