Colossians 1:9

And so, from the day we heard, we have not ceased to pray for you, asking that you may be filled with the knowledge of his will in all spiritual wisdom and understanding,

-Colossians 1:9

Paul tells them that they haven't stopped praying for them.  That's pretty cool, knowing someone's praying for you and so fervently.  It says "from the day we heard", which is pretty interesting.  Since hearing of their faith and love, which is a result of their hearing of the gospel, Paul hasn't stopped praying for them.

What's probably more important is what Paul prays for them.  He prays, "asking that you may be filled with the knowledge of his will in all spiritual wisdom and understanding".  I've been reading Prayer by Tim Keller and he comments on this in the beginning of the second chapter.  Tim Keller points out how interesting it is to see what Paul prays for in the beginning of some of his letters.  Instead of asking for a change in circumstances, which were probably very bleak for his readers,  Paul is essentially praying that they may know God better.  Not that a change in circumstances is wrong to ask for, but it seems to tell us what is important to Paul in his prayers for others.  Maybe with this in mind, it will change our perspective and what we pray for. as Paul asks, "that you may be filled with the knowledge of his will in all spiritual wisdom and understanding".