A pinch of philosophy, food to think, only because we lost the sense of who we are, to be happy one must not be identified to his thoughts, in fact we shouldn't use our brains:

Be you learning, or playing, or working, it's only spending your time. Truth is the only thing we really want, the true sense of life for everyone is inner peace, and this goes through a psychological comprehension for a return to being, everything else is not serious, everything else is filling up and finaly has no importance, because no incidence on who we are, it's for everyone to choose, but the serenity of being in each one of us is already there, immutable, infinite, immortal, we simply must allow ourselves to see the path that leads there.