According to Osho, maturation never ends; it is the boundless growth of your being—the content, not the changing container. Awareness is the method; maturity the result. Practice awareness in three layers: body, mind, and feelings. As awareness deepens, thoughts diminish, grace appears, consciousness expands, and maturity unfolds by itself.
You keep growing inside forever, and paying mindful attention to your body, thoughts, and feelings is the way that growth naturally happens.