It is said by Rūpa Gosvāmī that the attachment exhibited by pure devotees for Kṛṣṇa cannot possibly be perfected in the hearts of fruitive workers (karmīs) or mental speculators, because such attachment in pure Kṛṣṇa consciousness is very rare and not possible to achieve even for many liberated persons. As stated in Bhagavad-gītā, liberation from material contamination is the stage at which devotional service can be achieved. For a person who simply wants to have liberation and to merge into the impersonal brahma-jyotir, attachment to Kṛṣṇa is not possible to acquire. This attachment is very confidentially kept by Kṛṣṇa and is bestowed only upon pure devotees. Even ordinary devotees cannot have such pure attachment for Kṛṣṇa. Therefore, how is it possible for success to be achieved by persons whose hearts are contaminated by the actions and reactions of fruitive activities and who are entangled by various types of mental speculation?
There are many so-called devotees who artificially think of Kṛṣṇa's pastimes known as aṣṭa-kālīya-līlā. Sometimes one may artificially imitate these, pretending that Kṛṣṇa is talking with him in the form of a boy, or else one may pretend that Rādhārāṇī and Kṛṣṇa both have come to him and are talking with him. Such characteristics are sometimes exhibited by the impersonalist class of men, and they may captivate some innocent persons who have no knowledge in the science of devotional service. However, as soon as an experienced devotee sees all of these caricatures, he can immediately evaluate such rascaldom. If such a pretender is sometimes seen possessing imitative attachment to Kṛṣṇa, that will not be accepted as real attachment. It may be said, however, that such attachment gives the pretender hope that he may eventually rise onto the actual platform of pure devotional service.
This imitative attachment can be divided into two headings—namely, shadow attachment and parā (transcendental) attachment. If someone, without undergoing the regulative principles of devotional service or without being guided by a bona fide spiritual master, shows such imitative attachment, this is called shadow attachment. Sometimes it is found that a person actually attached to material enjoyment or salvation has the good fortune to associate with pure devotees while they are engaged in chanting the holy name of the Lord. By the good grace of the Lord one may also cooperate and join in the chanting. At that time, simply by the association of such pure devotees, the moonlike rays from their hearts reflect on him, and by the influence of the pure devotees he may show some likeness of attachment caused by inquisitiveness, but this is very flickering. And if by the manifestation of such shadow attachment one feels the disappearance of all material pangs, then it is called parā attachment.
Such shadow attachment or parā attachment can develop if one associates with a pure devotee or visits holy places like Vṛndāvana or Mathurā, and if an ordinary man develops such attachment for Kṛṣṇa and fortunately performs devotional activities in the association of pure devotees, he can also rise to the platform of pure devotional service. The conclusion is that transcendental attachment is so powerful that if such attachment is seen manifested even in some common man, by the association of a pure devotee it can bring one to the perfectional stage. But such attachment for Kṛṣṇa cannot be invoked in a person without his being sufficiently blessed by the association of pure devotees.
As attachment can be invoked by the association of pure devotees, so attachment can also be extinguished by offenses committed at the lotus feet of pure devotees. To be more clear, by the association of pure devotees attachment for Kṛṣṇa can be aroused, but if one commits offenses at the lotus feet of a devotee, one's shadow attachment or parā attachment can be extinguished. This extinguishing is like the waning of the full moon, which gradually decreases and at last becomes dark. One should therefore be very careful while associating with pure devotees to guard against committing an offense at their lotus feet.
Transcendental attachment, either shadow or parā, can be nullified by different degrees of offenses at the lotus feet of pure devotees. If the offense is very serious, then one's attachment becomes almost nil, and if the offense is not very serious, one's attachment can become second class or third class.
If someone becomes attached to the principles of salvation or to merging into the existence of the brahma-jyotir, his ecstasies gradually diminish into shadow and parā attachment or else transform into the principles of ahaṅgrahopāsanā. This ahaṅgrahopāsanā describes a living entity when he begins spiritual realization by identifying himself with the Supreme Lord. This state of self-realization is technically known as monism. The monist thinks himself one with the Supreme Lord. Thus, because he does not differentiate between himself and the Supreme Lord, it is his view that by worshiping himself he is worshiping the supreme whole.
Sometimes it is found that a neophyte is taking part in chanting and dancing very enthusiastically, but within himself he is under the impression that he has become one with the supreme whole. This conception of monism is completely different from pure, transcendental devotional service. If, however, it is seen that a person has developed a high standard of devotion without having undergone even the regulative principles, it is to be understood that his status of devotional service was achieved in a former life. For some reason or another it had been temporarily stopped, most probably by an offense committed at the lotus feet of a devotee. Now, with a good second chance, it has again begun to develop. The conclusion is that steady progress in devotional service can be attained only in the association of pure devotees.