A Pure Devotee Preacher
The pure devotee is not restricted to the limitations of садхана-бхакти, but follows those practices which nourish pure devotion. Pure devotion means Krishna consciousness, which specifically means service to Radha-Krishna.
Prabhupada conducted his life in that way. His only concern was for things that fostered the preaching and spreading of Krishna consciousness and the cultivation of essential spiritual life. The more we study texts about the most advanced Krishna consciousness as it exists between the Lord and His eternal associates, the more we see that Prabhupada was in that league.
He introduced Westerners to Radha-Krishna from the very beginning, but he also demonstrated gravity and privacy in his emotions. He taught that even if one is above the rules and regulations, he should still follow most of them to set an example. Prabhupada was sober. He didn’t give vent to many ecstatic expressions. Lord Caitanya was also careful about revealing His internal emotions when He was near superficial, ritualistic brahmanas while he was speaking with Ramananda Raya. Similarly, Prabhupada was always in the presence of doubters and atheists while preaching in the West, and thus his demeanor was sober and reserved.