Siksa outside ISKCON

What is Srila Prabhupada's understanding of Siksa for his followers? This paper offers the following answers:1. The association of Vaisnavas, and the instructions they impart, Siksa, are the assured means of success for spiritual practitioners. This is the injunction of Sastra.2. However, Srila Prabhupada observed that when his followers received instructions outside ISKCON, their devotional practices, for various reasons, became impaired.3.Therefore, Srila Prabhupada directed his followers to take Siksa solely from ISKCON's members