It is stated that simply by seeing such an elevated devotee of the Lord, one awakens the desire to engage in devotional service to the Lord. Simply by his glance, one gets his blessings. He seems to be calling out, “What are you doing here in the material world? Don’t you know that you have an eternal relationship with Krishna? Why are you wasting your time here?” That is what Srila Prabhupada’s glance would do to the heart, because he had the capacity to see Krishna in everything and in everyone. Therefore, by the force of his preaching, he would attract so many people to come and take part in Krishna consciousness.
LFD Vol 3,Uprooting Sinful Activities, Pg 211, 2nd last paragraph