In todays world a man remains Unhappy because his niegbour ,friends are happy.A man can easily earn to feed himself ,So he is not having problem of money ,but because his freinds are earning more than him that's why he is unhappy, The childerns of the Man may be good in study but then also he may be unhappy because his friend childrens are more effecient then his children , A mna may have loveable wife than also he may be unhappy because his friend wife is more beutiful then his .So to keep man happy is impossibe.

Amit