Many at times people worry about silly things which would never happens and they will realize it  in a later stage. This is called borrowing trouble, and is nicely illustrated in the following story:

There was once a man and a woman who planned  to go and spend the day at a friend’s house which was some distance from their own. So one pleasant morning they started out . To make the visit, but they had not gone very far before the woman remembered a bridge she had to cross, which was very old and was said to be unsafe, and she immediately began to worry about it. ” What shall we do about that bridge ?” she said to her husband. ” I shall never dare to go over it, and we can’t get across the river in any other way.” ” Oh,” said the man, ” I forgot that bridge ; it is a bad place ; suppose it should break through and we should fall into the water and be drowned !” ” Or even,” said his wife, “suppose you should step on a rotten plank and break your leg, what would become of me and the baby?” “I don’t know,” said the man, ” what would become of any of us, for I couldn’t work, and we should all starve to death.” So they went on, worrying until they got to the bridge, and, lo and behold ! they saw that since they had been there last a new bridge had been built, and they crossed over it in perfect safety, and found they might have spared themselves all their anxiety.

Some People worry over trouble that they expect to have long before it comes. Sometimes, and quite often, the trouble they expect never comes, so all their worry gives them needless pain.