The jiva to whom Godhead reveals Himself sees the same Divine manifestation everywhere and always, in His infinity of aspects. His cherished Divinity is to him verily an endless Ocean of perfect and exquisite bliss, free from every species of unwholesomeness, imperatively requiring his perennial loving service by His perpetual manifestations. The appearance of the Lord is for the purpose of making His devotees happy by affording them the Sight of Himself. The establishment of religion and the destruction of demons who appear as the enemies of Godhead do not require the Personal Appearance of Supreme Godhead Sree Krishna Himself. These functions can be, and as a matter of fact are ordinarily, performed by the Vishnu Avataras, or sometimes even by the favoured among the pure jivas, by His command. The establishment of the samkirtana of Krishna, which is the Divine Dispensation of this Kali Age, is effected by the Avatara for the Age, and it would not be necessary for Godhead to come down into this world for this purpose alone.

But there is a function which cannot be delegated, viz., that of pleasing the devotees. Love for Himself can neither be conferred nor be satisfied by anything short of Himself. It was for the purpose of bestowing, on fallen jivas, love for Himself in the perfect form that is found only in Goloka, that Sree Krishna, wearing the devotional mood and grace of Sree Radhika, appeared in this world in His Eternal Identical Form of Sree Krishna Chaitanya, with all His associates, elders and servitors eternally manifest in the 'White Island', the realm of Krishna's boundless and causeless Mercy.

In Braja Sree Radhika sets the model for the highest service of Krishna. In the 'White Island' it is Sree Krishna Himself who performs the function of teaching all individual souls how Sree Radhika serves Sree Krishna in Braja, by putting on Sree Radhika 's grace and devotion in order to enable Himself to serve Sree Krishna after the manner of Sree Radhika in Her highest Mood, viz., during Her separation from Sree Krishna. The service that is rendered by Sree Radhika manifests itself in this world in Braja at the close of the Dvapara Age. But in its direct manifestation it is not at all understood by mortals. It is only the Lord Himself Who can bestow this perfect loving devotion to Himself even on souls that are averse to Him on principle and thereby enable them to realize the true meaning of such pure devotion.

Many Chinese and Japanese acupuncturists (possibly out of a desire to "prove" the existence of chi to skeptical Westerners) have invented all sorts of electrical technological gadgetry to monitor the flow of chi through the meridians and to precisely locate the acupuncture points. So although chi cannot be perceived directly, its presence can be detected by a meter that monitors electrical activity.
Science of Identity Foundation - Siddhaswarupananda

This explanation of the real purpose of the advent of Sree Chaitanya is fully corroborated by the Scriptures and by the Activities of Sree Chaitanya Himself. When godhead Himself appears in this world, all His secondary Manifestations automatically merge in Him. It was in this wise that there were born among men, by the command of Godhead, in advance of His own Appearance, the kindreds, associates and servitors of the Lord.