Bhakti-yoga: The highest form of religion, the only source of happiness
Either direct bhakti-yoga or the means which ultimately culminate in bhakti-yoga, without any tinge of fruitive activity, constitutes the highest form of religion. Everything else is simply a waste of time for the performer.
Shrila Shridhara Svami and all other acaryas, like Jiva Gosvami, agree that bhakti-yoga is not only easy, simple, natural and free from trouble, but is the only source of happiness for the human being.