Even up to his last breath

Our beloved Srila Prabhupada conforms to the sastric description of who exactly is a perfect devotee. His behavior is flawless, as his every word and deed is meant to glorify the Supreme Personality of Godhead, Lord Sri Krsna. He never deviates from that full attention to the Absolute Truth and he cannot be seen at any moment engaged in any frivolous talk or momentary material idleness. Each and every moment in a fully surrendered devotee’s life, even up to his last breath, is connected in some way to Krsna’s Name, Form, Instructions, or Pastimes.
Also, since he is no longer affected in any way by the three modes of nature, he is never forced to act, even for a moment. Everything is being directed personally by Krsna by His Internal Potency. Therefore, no one can ever find any fault because he is as good as Krsna Himself, and is completely under His care and protection at every moment. Krsna has all strength, all power, all everything. And He is never for a moment separate from such a perfect devotee but is eternally united with him through love and devotion.
So as we understand through hearing what transcendental characteristics describe a cent percent pure devotee, and as we see how he is spreading Krsna’s message all over the world, we gradually develop faith in such a rare soul. And if we are sufficiently blessed by Srila Prabhupada and by Krsna from within our hearts, we can develop unshakable faith in both Krsna and our spiritual master, at which time all the imports of the scriptures will be revealed to us.