Just like the title says!
Most people will tell you that worry/concern/anxiety is wrong and that we need to stop doing it. If we are willing to look in Scripture, we will discover that this is not always true! Sometimes it can be an expression of love for God and neighbor... and then it would be sin to NOT do it! The presentation is sufficient to show what Scripture says. The word study is somewhat more extensive, and includes a few passages that are not relevant to this issue. (This study is based on a specific New Testament Greek word that is normally translated as worry, concern or anxiety. Restricting ourselves to the English words - worry and its synonyms - would bring us to similar results - though the verse list might be different.)