Whichever of the four devotional feelings towards Krishna the Bhakta (devotee) cultivates, it must reach the stage of unalloyed sincerity to be rewarded by its blissful realization. The loving Servant of Krishna must love His service above all he loves and holds dear. The devotee who wants to be the Friend and Companion of Krishna must have his all-forgetting Love of Krishna pervaded by an uninterrupted sense of equality with Him. He may serve Him as a slave, but it is the service of a friend who is more than a slave to his friend. The devotee who wants to love Krishna as a Father or Mother must have unwavering sincerity of such paternal love and affection. He or she must always consider himself or herself superior to Krishna whom they must regard as a helpless child in their charge. This true parental feeling is pervaded by the unconscious spirit of spontaneous service and friendship, for no friendship and service can be compared with those of parents. The same rules apply to the cultivation of the filial feeling of devotion to Krishna. The fourth, the feeling of a loving wife to her lord sums up the essence of all the foregoing three feelings, It is the highest and tenderest feeling of devotion. The true wife is the servant, friend, mother and lover of her husband. She is his slave, equal and superior by virtue of her all-surrendering love. Every form of pure love is self-surrender. The love that knows no surrender or sacrifice is a mockery. It mocks itself more than its object, for sacrifice is its chief test and best expression. Love that only loves, if loved, is pure selfishness, it is self-deception. But the love that loves for its own sake and is the fullest satisfaction in itself, the love that loves whoever or whatever its object loves is the Love Absolute that Krishna is. The human soul that develops it, binds Krishna thereby and holds Him its prisoner for good. When that Love develops the tenderness of a loving wife, it captivates the Heart of hearts, and entrances the Soul of souls, Krishna. These Vaishnav forms of devotion reached their highest degree of development and received their greatest impetus on the appearance of Sree Chaitanya, the Fullest Incarnation of Krishna, who was born in Nuddea, on the Ganges, Bengal, a little over four hundred years ago and flourished for nearly half a century. He was Krishna Himself incarnated in the form of His Greatest Devotee. Krishna is the Mystery and Chaitanya is its Explanation. Whenever Krishna comes to earth as the Mystery of Love in the Junction Period of Dwāpar and Kali, He comes again in the form, of Chaitanya as the Explanation of that Mystery, five thousand years after, to show to mankind the Way to Himself for examples.