Happiness and joy are acts of grace. […] We must never imagine that happiness is allotted to us as a mark of favor or distinction, but rather as a reason for feeling that we have been recipients of the grace outpoured by the divine spiritual beings. It is this realization of grace which makes progress possible; the other attitude would throw us back in our development. Nobody should ever believe that joy comes to him because of special karmic privileges; he should far rather believe that it comes to him because he has no privileges.
Joy and happiness should move us to deeds of compassion and mercy, which we shall perform more effectively than if we are suffering the pangs of sorrow. What brings us forward is the realization that we must make ourselves worthy of grace. There is no justification for the very prevalent view that one whose life abounds in happiness has deserved it. This is the very attitude that must be avoided. Please take this as an indication so that no misunderstanding may arise.
Source: Rudolf Steiner – GA 130 – Esoteric Christianity and the Mission of Christian Rosenkreutz – IV – INTIMATE WORKINGS OF KARMA – Vienna, 9th February 1912