Hi there,
life may or may not be full of  happiness. life may not be always be smooth there will be many hardship ,but it only makes it life more thrilling .It will also help us to enjoy success.
i hope  u understand and take life as a challenge and enjoy it
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   the life of every person on this world may not be full of happiness there are many problems faced by many people in this world. happiness is not to be rich it is all about the way we live our life is it peace full or rough with many problems. the person who says that he is happy may not be really happy because he might have some of the problem. so happiness is not all about rich or poor.

hope so my answer is useful