Ephesians 3:17-19

That Christ may dwell in your heart through faith; that you, being rooted and grounded in love, may be able to comprehend with all the saints what is the width and length and depth and height—to know the love of Christ which passes knowledge; that you may be filled with all the fullness of God.

Our faith is the key to unlock the door to God. When we root ourselves in the God kind of love with the God kind of faith, we will comprehend our value to God.  God has a purpose for our life, and we all need to know our mission. We need to know the love of Christ, which passes knowledge. As we grow in the knowledge of God, we will be filled with the fullness of God.