This passage shows first of all that all who are in Christ are a family - this is a relationship we call fellowship, since we share so much so closely. This is like the Dutch word Gezelligheid, meaning belonging or a good time spent with loved ones. Then verse 16 continues to show that we can find strength in His infinite glory inside of us. This is where Christ now lives! So we walk, or live, by this faith that believes and actively trusts in Him along the way.
Ephesians 3:14-17
14 For this reason I bow my knees to the Father of our Lord Jesus Christ, 15 from whom the whole family in heaven and earth is named, 16 that He would grant you, according to the riches of His glory, to be strengthened with might through His Spirit in the inner man, 17 that Christ may dwell in your hearts through faith;