Every believer must progress from spiritual milk to spiritual meat to achieve Christian maturity. Spiritual milk represents basic Gospel doctrines like salvation and grace, while spiritual meat involves deeper concepts like sanctification, justification, and spiritual warfare. Mature believers can distinguish between good and evil through trained discernment. This growth requires intentional study, prayer, obedience, and community involvement. Signs of maturity include seeking God's will first, responding to trials with faith, and teaching others. The journey from spiritual infancy to maturity is essential for healthy Christian living and requires moving beyond basic doctrines to deeper spiritual truths.