Our Christian life should be filled with the divine life of Christ. The very definition of a 'christian' quantifies this. If not, we are as good as a deflated tyre, yet, can still be filled and we must be filled. Otherwise, we fool ourselves and become a laughing stock to the enemy.
Paul, in his epistle to the Philipians, assuredly wrote, "For to me to live is Christ.." By such, he declared he was a christian and testified that he meant it, for indeed, he lived Christ and Christ lived in him and through him. So is the case with us.
Am I a christian? Indeed, I am! For Christ lives in me since I believed into Him. This is my spiritual birthright! Since I was born of God the Spirit in my spirit, Christ, as the seed of the divine life, was sown into my spirit. This is the spiritual fact of every believer.
Christ, in Himself needs no growth, for He is the complete and perfect God. However, in us, since the time we were born of Him in our spirit, He is the Seed in our spirit. This Seed needs growth. Christ needs to grow from within our being and fill us. Otherwise, we become a victim of spiritual malnutrition and will remain a spiritual dwarf.
May we allow Him to grow in us by opening to Him moment by moment, giving Him the rights to every avenue of our inward being, and let Him have His way in us and through us. And be thus filled with Him as the Spirit in our spirit, penetrating through our soul and eventually His filling within us be expressed without through our body in our daily God-man living, a living of a christian life.