to understand life, you have to understand how to respect each situation of each human that came and cross your life , because in each struggle they been to and you haven't you wont understand truly meaning of happiness. everything temporally with a side effect that no one know how long its takes , some call it good karma and bad karma . karma is a beautify method of god showing his love to all of us . just for those that didnt understand thinking the other ways around it .
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From @santosamaru