Read Colossians 2:7 Using Other Translations
Rooted and built up in him, and stablished in the faith, as ye have been taught, abounding therein with thanksgiving.
rooted and built up in him and established in the faith, just as you were taught, abounding in thanksgiving.
Let your roots grow down into him, and let your lives be built on him. Then your faith will grow strong in the truth you were taught, and you will overflow with thankfulness.