"One is forbidden to observe the activities of a pure Vaiṣṇava from a material point of view. For the neophyte especially, considering a pure devotee from a material point of view is very injurious. One should therefore avoid observing a pure devotee externally, but should try to see the internal features and understand how he is engaged in the transcendental loving service of the Lord. In this way one can avoid seeing the pure devotee from a material point of view, and thus one can gradually become a purified devotee himself."
(Nectar of Instruction 6, Purport)
"A pure devotee's activities may appear like ordinary activities, but behind them there is profound significance—the satisfaction of the Lord. In order to understand the activities of a Vaiṣṇava, one has to become very expert."
(Śrīmad-Bhāgavatam 4.22.50, Purport)
"A Vaiṣṇava is always engaged in the transcendental loving service of the Lord, and thus neither karmīs nor jñānīs can understand the activities of a Vaiṣṇava. It is said, vaiṣṇavera kriyā-mudrā vijñeha nā bujhaya: (CC Madhya 23.39) even the most learned man depending on direct perception of knowledge cannot understand the activities of a Vaiṣṇava."
(Caitanya-caritāmṛta Madhya 7.66, Purport)
"Kṛṣṇa's devotee is not subjected to material condition, even though his bodily features may appear materially conditioned. One should therefore not see a pure devotee from a materialistic point of view. Unless one is actually a devotee, he cannot see another devotee perfectly."
(Nectar of Instruction 6, Purport)
"It is said, therefore, by Vaiṣṇava authorities that even the most intelligent person cannot understand the plans and activities of a pure devotee. The exact words are vaiṣṇavera kriyā mudrā vijñe nā bujhayā. A person who is thus always engaged in the service of the Lord or is always thinking and planning how to serve the Lord is to be considered completely liberated at present and in the future. His going home, back to Godhead, is guaranteed. He is above all materialistic criticism, just as Kṛṣṇa is above all criticism."
(Bhagavad-gītā As It Is 9.28, Purport)
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