I have been told by Dale Carnegie in a book called "How to stop worrying and start living", that 92% of all worries never take place and the last 8% we need to face. So why worry? 

Normally, we try to protect ourself from danger and provide for our living needs. Some people are successful and others are not.

When we cannot protect ourselves then prayer should be used. Many prayers are answered and some are not answered, in our opinion.

It does appear that some people have dreadful trials and I wonder why?

Hunger,death and suffering can affect the birds of the air from time to time, like ourselves, so this appears to be the natural state.  

I believe, that prayer is the only successful way to ask for help but we cannot be sure how this help arrives.