Help! Is my co-worker helping or hindering?

What do you do when a co-worker keeps sending you postings for potential “next career moves?”  The answer to this is really based on a couple of things.  Do you trust your co-worker to have YOUR best interest at heart?  Do they know you well enough to point out career options for you?   What is the risk if you do apply for another role while still employed?  Can your co-worker offer any insight into the new potential role?  Do you know yourself well enough to be clear on what you are looking for when an “unsuspecting” opportunity presents itself?  It is always better to be “moving towards” your next career option rather than “running away” from a situation where you are unhappy.