one day, a fisherman cast his net into a pool. he was lucky to catch a fish. it was a tiny fish, and the fisherman was very happy. the little fish tried to fool the fisherman by begging to be set free. she said,'' please let me go. I am too tiny. if you catch me now, I will be of no use to you. but if you catch me when I grow big, I will be of use to you then .'' the fisherman thought for some time. he remarked,'' don't try to fool me! if I let you go now, I will never see you again. so, i won't let you go.''
MORAL: don't let anyone fool you. always take decisions after you think well about the situation.
source: Panchatantra