The following is an excerpt from a conversation between Śrīla Bhakti Prajñāna Keśava Mahārāja and a church bishop, who was a famous philosopher and preacher of Christianity (Ācārya Kesarī Śrī Śrīmad Bhakti Prajñāna Keśava Gosvāmī – His Life and Teachings, 2nd Edition by Śrīla Bhaktivedānta Nārāyaṇa Mahārāja)

Archbishop of the Church of Prayāga (Allahābāda): Then why do you worship the fair-complexioned Śrī Gaurāṅga Mahāprabhu?

Śrīla Bhakti Prajñāna Keśava Mahārāja: All the qualities of the material nature are abominable and distressful. Beyond this, in the spiritual world, there is a treasure of transcendental virtuous qualities. Śrī Caitanya Mahāprabhu is the unlimited treasure house of all those transcendental qualities, and the mixture of those spiritual qualities is His bodily lustre. The combination of all the colours in sunlight appears white, but in fact it is a mixture of seven colours: red, orange, yellow, green, blue, indigo and violet. We see this in the rainy season, when the sun’s light is refracted to make a rainbow, in which all seven colours are easily visible. Similarly, our worshipful Śrī Gaurasundara embodies unlimited transcendental qualities.