Ephesians 3:16 says "that he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man". Prayer is the only way to strengthen your inner man.

     Every time when you pray its give/ provide/ built Joints to your Spiritual man and it help to raise your inner man up to the Christ. 

     Pray Daily and observe your inner man growing in the likeness you Lord Jesus Christ.