Happiness is a state of mind and it has nothing to do with material possessions.
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We see multimillionaires screaming and feeling miserable since they lost a bundle on Wall Street playing stocks;
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At the same time, we will also see a man rejoicing himself staying in a leaking hut not even sure from where he will get his next meal!!!!
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Sounds paradoxical!
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But very true.
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Truly, nothing in this world can make us happy, unless we are happy within.
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Lord Krishna even said to his best friend Arjuna:

"Arjuna, everything comes and goes in life. Happiness and unhappiness are temporary experiences that rise from sense perception. Heat and cold, pleasure and pain will come and go. They never last forever. So do not get attached to them."
(Bhagavad Gita Chapter 2:14)
.Jay Shree Krishna