One of the most startling passages in the Bible connects the magnificence of angels with the mystery of the gospel. Angels are incredibly majestic and powerful beings, living in God’s eternal presence. Yet there is something that has happened on the earth that is so stupendous that even these immortal beings experience the persistent longing “to look into these things” (I Peter 1:10, 12). What are “these things” that could possibly and consistently consume the attention of God-fixated creatures? The answer is – the gospel.
The angels never get tired of looking into the gospel. This means that there is no end to gospel exploration. These are depths in the gospel that are always there to be discovered and applied not only to our ministry and daily Christian life, but above all to the worship of the God of the gospel with renewed vision and humility.
– Tim Keller, in the forward to Gospel: Recovering the Power that Made Christianity Revolutionary; B&H Publishing Group; Nashville, TN; Copyright 2011; Kindle Edition; location 125