Know that God’s grace has descended upon you when
Anything related to Lord is perceived as if it is Lord Himself
Anything unrelated is perceived with indifference,
Anything in opposition to Lord is opposed.
(Vallabhacarya)
You may cry, shiver, or faint while chanting, but none of these signs guarantee that you have received the Lord’s mercy or grace. You may also feel blissful while chanting, but that is not a sure proof of the Lord’s favor. For all these signs could be mere shadows of the real symptoms, or just emotional reactions, or even deceptive tricks of Maya.
The only way to confirm that you have received the Lord’s grace is when your outlook, your vision, your way of thinking completely changes, by a full 180 degrees.
When you receive the Lord’s grace, you will stop caring about things related to yourself, and you will care deeply about things related to the Lord. You will be indifferent to things that have no connection to the Lord, and you will resist anything that goes against the Lord.
These symptoms were present in our beloved Srila Prabhupada. He strongly opposed atheists, scientists, and philosophers. He was totally unconcerned with any worldly or charitable activities. And he gave utmost importance and attention to anything or anyone that had even a slight relation to the Lord.