Here is another fine article compiled by Vidura Mahatma Prabhu, which appeared in my mailbox some time back. Some very nice quotes.
The Cause of Confusion and Dissension in the Krishna Consciousness Movement
by Vidura Mahatma Das
“When disciples do not stick to the principle of accepting the order of their spiritual master, immediately there are two opinions. Any opinion different from the opinion of the spiritual master is useless. One cannot infiltrate materially concocted ideas into spiritual advancement. That is deviation. There is no scope for adjusting spiritual advancement to material ideas.” (Caitanya-caritamrta Adi 12.9 purport)
“All the devotees connected with this Kṛṣṇa consciousness movement must read all the books that have been translated (Caitanya-caritāmṛta, Śrīmad-Bhāgavatam, Bhagavad-gītā and others); otherwise, after some time, they will simply eat, sleep and fall down from their position. Thus they will miss the opportunity to attain an eternal, blissful life of transcendental pleasure.”
(Chaitanya-caritamrta Madhya-lila 25.278 : Purport by Srila Prabhupada)
“The order of the spiritual master is the active principle in spiritual life. Anyone who disobeys the order of the spiritual master immediately becomes useless.” (CC Adi 12.10)