Many psychologists understand, to varying degree, the workings of the mind; philosophers also examine happiness from a different perspective. Nevertheless, I think, among all the religions and academic disciplines, it is Buddhism that has the most complete view on this subject. The study of the mind in Buddhism is extremely sophisticated. How the mind functions is very clearly elucidated by the Buddha in the sutras.

~ Depicted from THE PAPER TIGER - The Tibetan Buddhist View on Happiness