Answer
Yes. Association with Vaishnavas is absolutely essential.
At the same time, the teachings of these advanced devotees are not separate from the teachings of Srila Prabhupada. Everything is already present in Srila Prabhupada's books.
Study his books deeply and carefully. You will gain profound realizations.
For example, if you want to understand sinful activity, don't settle for a superficial understanding. Search through Srila Prabhupada's books and study everything he says on that subject. Today, with the Folio software and digital search facilities, this has become very easy. Decades ago, one would have had to read every book from beginning to end to collect all those references. Today, you can simply search for terms like sin or sinful, read all the relevant passages, and develop a clear understanding.
Approach every important spiritual subject in this way.
This is exactly how one should study topics such as the holy name and japa.
Srila Prabhupada repeatedly emphasizes that we should chant and hear the very same sound. By carefully studying his explanations and connecting them with his various examples—such as the example of an iron rod placed in fire—we gradually understand the deeper meaning of his instructions. Just as iron becomes fiery only by remaining in contact with fire, we become spiritually transformed by continuously hearing the holy name that we chant.
Therefore, two things are essential:
Careful, thoughtful study of Srila Prabhupada's books.
Regular association with Vaishnavas.
Together, these deepen realization and steadily purify our perception.
