Meaning of an proverb: Laugh if you want to , he who laughs last laughs longest

[Sonia*]

hell sir please let me know the meaning of this proverb.

well, I am actually not sure if it is an idiom or proverb.

"Laugh if you want to ,he who laughs last laughs longest..."

Thanks a million!

[Milanya]

He who laughs last, laughs longest. and He who laughs last, laughs best.
Prov. If someone does something nasty to you, that person may feel satisfaction, but you will feel even more satisfaction if you get revenge on that person. Joe pulled a dirty trick on me, but I'll get him back. He who laughs last, laughs best.
http://idioms.thefreedictionary.com/He+who+laughs+last%2c+laughs+longest
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con·text - The part of a text or statement that surrounds a particular word or passage and determines its meaning.

[Sonia*]

Hello Milanya.

Thanks for the reply but what is the meaning of this Proverb. . .I have got the clue in what sort of situation we can use this proverb but what exactly the meaning of this proverb is. please reply. And do correct me If somewhere I use incorrect Grammatical rules. I would really appreciate your input.

Thanks a million.
sonia*