Commentaries:
Robertson's Word Pictures (NT)
Having heard of (akousantev). Literary plural unless Timothy is included. Aorist active participle of akouw of antecedent action to euxaristoumen. Epaphras (verse Colossians 1:8) had told Paul.
Your faith in Jesus Christ (thn pistin umwn en Ihsou Xristw). See Ephesians 1:15 for similar phrase. No article is needed before en as it is a closely knit phrase and bears the same sense as the objective genitive in Galatians 2:16 (dia pistewv Xristou Ihsou, by faith in Christ Jesus).
Which ye have (hn exete). Probably genuine (Aleph A C D), though B omits it and others have the article (thn). There is a real distinction here between en (sphere or basis) and eiv (direction towards), though they are often identical in idea.
Other Robertson's Word Pictures (NT) entries containing Colossians 1:4:
2 Thessalonians 1:11
1 Timothy 3:13
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