""Building one’s confidence by working on one’s strength, being comfortable with oneself, accepting changes, accepting the fact that changes cannot always be made, developing a positive attitude,consciously striving towards a better self and living in the present are the milestones on the ‘silky route’ to inner joy. It is important, however, not to overtly indulge and to reduce the search for happiness into yet another stress-filled, time- bound goal""

The last above sentences are the ultimate source if one needs to be happy. The article is nice and I wish to read more on medical aspects of meditation.