We worry a lot in life about many things like family, friends, relationships, work, health, wealth, etc. Oh, our lives are full of worries aren't they :)
I learned that we should be concerned about life but not worried about it. I know it's easy to say but hard to do when the time comes. But it can and should be done for our peace of mind and happiness.
I pray to God to have the wisdom to do the following whenever I get worried with a problem:
1) Calmly understand what the problem is and accept the worst case.
2) Analyze what caused the problem so that next time I don't repeat it.
3) Try to find out all the possible solutions to the problem.
4) Then see which solution is the best answer for me.
5) Once I get the solution, put it in practice without bothering about the consequences.
So let's work out the difference between concern and worry with an example:
Say I have just written one of the tough engineering exam paper. In case I was worried as I usually was I would do the following:
I would keep worrying about what would happen. What would happen if I failed? What would I tell my parents? What about my reputation?
That is what being worried means. We constantly think about a thing going in a loop in our head.
Being concerned means I would follow the above steps:
1) Understand that I did my best but the paper was tough and I might fail.
2) See where I made mistakes and improve my technique of studying for more efficiency.
3) The solutions to the problem would be: to reappear for paper the next time or to use illegal means.
4) The best solution for me would be to reappear for the paper the next time.
5) So I would put the worries out of my mind and calmly wait for the results without selling my text books to my juniors :)
So the next time life throws us one of those curve balls, let us not keep on swirling our eyes with the ball. But calmly wait for the ball to reach within our grasp and hammer the hell out of it as best as we can.