Mature believers are drawing upon the power of God alone for the spiritual toughness needed to persevere through difficulty.
Mature believers are being filled with a life-changing knowledge of God that comes from the Holy Spirit.
What are the aspects of your prayerfulness that will help demonstrate maturity?
Apart from grace, people do not want what they need, but God is gracious and enlivens the souls of His people to hunger and thirst for what He gives.