Why do I become angry in the propagation of knowledge when some one opposes it?

[Dr. Sheshadri Thiruvenkadam (Balaji) asked] 

Swami rerplied: You need not become angry with opponents, who argue with you because the opponent approaches you by the will of God to open up a new dimension through those arguments. You must always thank the opponent in the name of God. Even if a person refuses your knowledge and goes away due to the rigid conservative traditional beliefs of blind elders injected in him, you should pity him since he is abandoned as a condemned soul forever. The doctor should pity the patient, whose disease could not be cured in spite of his long intensive treatment. But remember one point, if your knowledge contains the absolute truth, it has entered his soul and it will grind the ignorance of the soul like a rat drilling a hole through even a mountain. The drilling may be slow but the mountain is going to be powdered one day or the other. That is the power of the truth. When all the ignorance of the soul is powdered, he cannot bear the rat anymore and will transfer the rat to other souls. Hence, the truth has the tremendous power of propagation by its own virtue.

You only take the opportunity to serve the mission of God and get His grace by doing the propagation of this divine knowledge. Even without all of you, this divine knowledge of God will spread by itself. Monkeys were given an opportunity to participate in the service of the Lord for their divine benefit alone. The work of Rama could have been completed even without the monkeys.