By the mercy of my Gurudeva, I remembered his tika to one of the verses of the Siksastakam where he discusses one of the jiva soul´s biggest enemies: ENVY (matsarya).

I also immediately came upon this wonderful verse in the beginning of the Srimad Bhagavatam (1.1.2):

“In this glorious Bhagavata Purana, written down by the great sage Vedavyasa, has been taught that Supreme Dharma [Bhagavata Dharma], which is entirely free from all self-deception in the form of selfish desires (including the desire for impersonal liberation). Herein has been expounded that Absolute Reality, which can be known only by devotees who are free from envy, which is the bestower of supreme bliss and which uproots the threefold miseries of material nature.

What is the use of other books?

While it is doubtful that the Supreme Lord can be speedily captured in one´s heart by other means, He can be instantly seized through this work alone by the saintly persons who have a service attitude and are keen to hear it recited.”

This a very huge and extremely deep verse with many points, but I focused on the sentence “who are free from envy”. So, the Srimad Bhagavatam and its essence can only be known by devotees who are free of envy and Krishna can only be captured by devotees with a humble service attitude.
This humble service attitude is also the cure to be free from envy as we shall see later on.

Being filled with hatred towards other parivars or sadhus will never open the door to understand the essence of Gaudiya Vaishnavism or any essence of any spiritual path.

What is this great enemy?  How does it arise? How to destroy it?

My Gurudeva writes:

“When we investigate the root cause of offenses, then we can see that it is an envious mood that stops love from entering our hearts. This envy finds its cause in false egotism, and as a result a low person may consider himself to be the greatest, the ignorant may think themselves to be very learned, and one is unable to see one’s own fault and another person’s qualities. Thus one praises oneself and criticises others.
In this way offensive persons are envious of another person’s success and cannot tolerate the greatness of another Vaiṣṇava, although he can clearly recognise that greatness.
They may even consider the guru, who is the very form of God’s great mercy (kāruṇya ghana vigraha) to be an ordinary human being and they cannot have faith in the glorification of the holy name, even if they have clearly heard it.
False words, violent behaviour and sinful acts like theft and so will create great offenses in the heart of such an envious and deceitful persona.”

…

“The desire for distinction can only appear in the heart of a devotee who has no taste for hearing and chanting the glories of the Lord (bhajana). The only target of the devotees who are free from desires, who are pure-hearted and who are fixed in worship of God is prema, love of God.
These devotees are able to cast the vice of pratiṣṭhāśā far away by being ornamented by virtues like humility.
As soon as one gives shelter to this shameless dog-eating woman in the heart even once the result will be terrible, for this woman is never alone. She will call her dog-eating husband named mātsarya (envy), the inability to tolerate another person’s superiority. ‘parotkarṣāsahanaṁ mātsaryam’.
There is no more disgusting mentality than this, and it will turn a human heart into one of an animal.

The seed of the husband named mātsarya will conceive twin children in the womb of his wife pratiṣṭhā, named hiṁsā (violence) and asūyā (malice, slander). Their terrible dancing will crush all virtues within the heart and fill it with great cruelty. Then we will externally wear all the signs of a Vaiṣṇava and mechanically follow the process of hearing and chanting, but we will not hesitate to behave mercilessly toward other people for the sake of some insignificant temporary selfish desires.
We will feel great pleasure while hurting other people’s feelings with our words or behaviour for no just reason. It is most deplorable that even then we think of ourselves as greatly qualified scholars, devotees, and bhajanānandīs!”

…

“Śrīmad Bhāgavata opens with the words nirmatsarānāṁ satāṁ: this bhāgavata (Vaiṣṇava)-religion is accessible only to good and non-envious people.

How many verses haven’t I memorised, how nicely can’t I lecture on Bhāgavata-philosophy, but I did not manage to become free from envy! When I hear that there is a greater scholar, writer, lecturer or devotee than me somewhere, my heart starts burning, and I can’t find any peace unless and until I can diminish his superiority by finding some fault in him.

Can pure devotion ever awaken in the heart of such an ambitious and envious person?
Hence Śrīpāda Raghunātha has said: kathaṁ sādhu-premā spṛśati śucir etan nanu manaḥ – “O Mind! The shameless dogeating woman of the desire for distinction is dancing in your heart! How can the most pure love of God ever enter such a foul heart?

There is only one way to cast this shameless witch of the desire for distinction out of the field of the heart and that is to humbly serve the powerful generals amongst Śrī Kṛṣṇa’s devotees, the great souls. They will chase this shameless dog-eating woman of the desire for distinction out of the heart and bestow love of God on such a fortunate servant, after infusing all saintly qualities like humility in him.”

…

“Although Ṭhākura Mahāśaya has vowed to give the six enemies a place in his practice of worship, he remains silent when it comes to mātsarya. From this we must understand that unless the enemy of envy is destroyed one can never become qualified for bhajana.
Only non-envious saints are qualified for bhāgavata dharma. In the opening of Śrīmad Bhāgavata it is seen — nirmatsarāṇāṁ satām (Bhāg. 1.1.2)

If even a semblance of envy gets a place in the heart one is deprived from the right to devotion. Therefore the practising devotee has no other choice than to kick envy out of the heart. There is only one means to remove envy from the heart and that is to love everyone with generosity and with a simple and sincere heart. All living beings must be given due respect with the understanding that Kṛṣṇa dwells in them all— jīve sammāna dibe jāni kṛṣṇa adhiṣṭhāna (C.C.)”

So we can clearly see that the enemy called “envy” must be destroyed by being a humble servant of the Vaishnavas, ALL Vaishnavas, and respect must be given to every living being.

When we trap ourselves in a cage built with prejudices and claims for the monopoly of the truth, completely disregarding other Vaishnavas and even calling them names, we can chant as many rounds as we may claim. The Holy Name and all our activities in bhakti will never be fruitful.

Therefore, looking into my own heart, I pray that I can destroy this great enemy too in due course of time.