(Guru-Gauranga altar, Krishna-Balarama Mandir, Vrindavan—click to enlarge)
"In the beginning, during the presence of Oṁ Viṣṇupāda Paramahaṁsa Parivrājakācārya Aṣṭottara-śata Śrī Śrīmad Bhaktisiddhānta Sarasvatī Ṭhākura Prabhupāda, all the disciples worked in agreement; but just after his disappearance, they disagreed. One party strictly followed the instructions of Bhaktisiddhānta Sarasvatī Ṭhākura, but another group created their own concoction about executing his desires.
Bhaktisiddhānta Sarasvatī Ṭhākura, at the time of his departure, requested all his disciples to form a governing body and conduct missionary activities cooperatively. He did not instruct a particular man to become the next ācārya. But just after his passing away, his leading secretaries made plans, without authority, to occupy the post of ācārya, and they split into two factions over who the next ācārya would be. Consequently, both factions were asāra, or useless, because they had no authority, having disobeyed the order of the spiritual master. Despite the spiritual master’s order to form a governing body and execute the missionary activities of the Gauḍīya Maṭha, the two unauthorized factions began litigation that is still going on after forty years with no decision.
Therefore, we do not belong to any faction. But because the two parties, busy dividing the material assets of the Gauḍīya Maṭha institution, stopped the preaching work, we took up the mission of Bhaktisiddhānta Sarasvatī Ṭhākura and Bhaktivinoda Ṭhākura to preach the cult of Caitanya Mahāprabhu all over the world, under the protection of all the predecessor ācāryas, and we find that our humble attempt has been successful. We followed the principles especially explained by Śrīla Viśvanātha Cakravartī Ṭhākura in his commentary on the Bhagavad-gītā verse beginning vyavasāyātmikā buddhir ekeha kuru-nandana (BG 2.41). According to this instruction of Viśvanātha Cakravartī Ṭhākura, it is the duty of a disciple to follow strictly the orders of his spiritual master. The secret of success in advancement in spiritual life is the firm faith of the disciple in the orders of his spiritual master. The Vedas confirm this:
yasya deve parā bhaktir yathā deve tathā gurau
tasyaite kathitā hy arthāḥ prakāśante mahātmanaḥ
'To one who has staunch faith in the words of the spiritual master and the words of the Supreme Personality of Godhead, the secret of success in Vedic knowledge is revealed.' The Kṛṣṇa consciousness movement is being propagated according to this principle, and therefore our preaching work is going on successfully, in spite of the many impediments offered by antagonistic demons, because we are getting positive help from our previous ācāryas."
(Caitanya-caritāmṛta Ādi 12.8, Purport)