Although the premika bhakta is the sole object of Sri Bhagavan’s prema, still Sri Bhagavan reciprocates with that devotee according to the degree that the devotee loves Him. The gopis are Sri Bhagavan’s eternally beloved associates, thus being the object of that eternally perfect, absolute bhagavata-prema, their glories are especially self-evident. Furthermore, by the word nitya we can see that the gopis are never even slightly disregarded by Sri Bhagavan. Sri Närada will further elucidate upon this topic in sri-goloka-mahatmya.
You may ask how the glories of this confidential subject matter can be ascertained when the exalted prema of the gopis is imperceptible to our mundane mind and intelligence? It is true gopi-prema is beyond the minds of even the great sages, but this becomes manifest itself by the special potency of the distinct incarnation of Sri Radha-Ramana-deva, that is, although Sri Caitanya-deva is personally Sri Krsna, nonetheless He especially descended to reveal prema-bhakti. Accordingly, He made the mood of the gopis become naturally evident, indicating that His mercy extends this gopi-prema unto everyone. Sri Caitanya’s continuous, manifest love for Sri Krsna made the gopis’ love for Sri Krsna also understandable. In other words, Bhagavan Sri Krsna as Sri Caitanya became influenced by the mood of the gopis, and after personally tasting that gopi-prema, disseminated it throughout the world. (BB, Vol. 1.1 purport)