The most fundamental thing to be remembered is that life is dialectical. It exists through duality, it is a rhythm between opposites. You cannot be happy forever, otherwise happiness will lose all meaning. You cannot be in harmony forever, otherwise you will become unaware of the harmony. Harmony has to be followed by discord again and again, and happiness has to be followed by unhappiness. Every pleasure has its own pain, and every pain has its own pleasure. Unless one understands this duality of existence, one remains in unnecessary misery. Accept the total, with all its agonies and all its ecstasies. Don’t hanker for the impossible; don’t desire that there should be only ecstasy and no agony.