'Completeness' in the Bible

Therefore, since we have these [great and wonderful] promises, beloved, let us cleanse ourselves from everything that contaminates body and spirit, completing holiness [living a consecrated life—a life set apart for God’s purpose] in the fear of God.

the completeness of Him who everywhere fills the universe with Himself.

yes, to attain to a knowledge of the knowledge-surpassing love of Christ, so that you may be made complete in accordance with God's own standard of completeness.

until we all reach oneness in the faith and in the knowledge of the Son of God, [growing spiritually] to become a mature believer, reaching to the measure of the fullness of Christ [manifesting His spiritual completeness and exercising our spiritual gifts in unity].

Therefore let us get past the elementary stage in the teachings about the Christ, advancing on to maturity and perfection and spiritual completeness, [doing this] without laying again a foundation of repentance from dead works and of faith toward God,