Pastor Larry Stockstill
John designates three types of Christians, according to their maturity levels. His first exhortation is to the "dear children" whose entire experience and excitement revolves around the knowledge that their sins have been forgiven. Every new Christian needs to be taught and discipled in this simple truth. Unfortunately, most believers never fully enjoy the one basic fact that their sins have been forgiven on account of Jesus.
The second level of Christian maturity is the "young" (1 John 2:13). These Christians have moved into the level of spiritual warfare. They are strong in God's Word and have overcome the devil (v. 14). They have allowed God to tear down the strongholds of Satan over their minds, bodies, and past struggles. They understand the truths of spiritual freedom from bondage and live in that freedom.
The last group is the "mature," who know Christ (v. 13). These people, walking in close relationship with God, know Him as more than just Forgiver and Deliverer. They know God as Father in spiritual worship and intimacy.
Grow up, little one. Your Father has more of His goodness for you to enjoy.