I really liked this passage from an early letter by a Christian writing to explain our faith to a friend. This letter is thought to be from the middle of the second century and is a wonderful explanation of who God is and what Christ did for us. I love the beautiful description of God's character in this passage:
"God, the Lord and Fashioner of all things, who made all things, and assigned them their several positions, proved Himself not merely a friend of mankind, but also long-suffering [in His dealings with them.] Yea, He was always of such a character, and still is, and will ever be, kind and good, and free from wrath, and true, and the only one who is [absolutely] good; and He formed in His mind a great and unspeakable conception, which He communicated to His Son alone. As long, then, as He held and preserved His own wise counsel in concealment, He appeared to neglect us, and to have no care over us. But after He revealed and laid open, through His beloved Son, the things which had been prepared from the beginning, He conferred every blessing all at once upon us, so that we should both share in His benefits, and see and be active [in His service]."
Letter from Mathetes to Diognetus, [Ch. 8]