Two crows challenged each other for a flying competition to see which of them could fly highest, while carrying a sack of even size.
The first crow flew with his sack of cotton laughing at the other crow who was carrying a sack of salt which was much heavier.
However, when it began to rain and as it was expected, the salt carried by the second crow began to dissolve, whereas the cotton absorbed the rain water and became so heavy that the first crow, far from being able to compete with the other crow, came fluttering down. It had to accept defeat.

Moral : Situation changes very fast some times.