en_tn_condensed/col/02/07.md

Be rooted ... be built ... be established ... abound

These words explain what it means to "walk in him." Paul speaks of a person with true faith in Christ as if that person were a tree growing in solid ground with deep roots.

be built on him

Paul speaks of a person with true faith in Christ as if that person were a building that has a strong foundation.

be established in faith

"trust in Jesus for everything"

just as you were taught

"just as you learned" or "just as they taught you"

abound in thanksgiving

"be very thankful to God"