If we were to name one single book, which connects all the devotees of Krsna in the world, it would be the Bhagavad-gita. Spoken 5000 years ago, on a battlefield, it is a recorded conversation between Sri Krsna, the Supreme Personality of Godhead and Arjuna, his confidential associate. In the Second Chapter of this exalted literature. Lord Krsna explains the fundamental teaching of spiritual knowledge:
As the embodied soul continually passes, in this body, from boyhood to youth to old age, the soul similarly passes into another body at death. The self-realized soul is not bewildered by such a change.
Just as we had a body of a child, then youth, then grown up person, we will have a body of an old man, but although the body changes, we remain the same self, who observes these changes. It is only on account of the spirit soul being present in the body, the body works. As soon as the living force leaves the body, there’s no more life and no amount of scientific knowledge can bring it back. The body works because of the presence of spirit, not the other way around.
The same might be said of spiritual movements, or spiritual institutions. Whenever powerful devotee of the Lord appears in the world, he re-establishes eternal principles of religion and inspires a great number of conditioned souls to assist him in spreading the message of the Supreme Lord. For this reason he might also establish a spiritual institution, or an organized society through which the message is disseminated amongst the humankind. However, when the powerful saint departs, things again deteriorate and unauthorized persons introduce imperfect sectarian concepts of religion in order to dominate sections of people instead of serving the Lord for the benefit of humanity at large.
When we speak of departure of a great saint, it is not necessary a departure on the physical plane. The genuine saint does not act on the physical plane whatsoever being fully absorbed in his transcendental engagement of pure service. The departure rather means a departure from the hearts of his followers. Just as the body, where the soul is absent becomes a subject to many living entities in the ground, the follower who disobeys his master becomes immediately subject to the rules and regulations of the degraded material world and the institution which was meant for spiritual upliftment of mankind turns into a compromised mundane business. No matter how nicely the so-called follower decorates himself by the stolen dress of his saintly master, he cannot awaken the true spirit of surrender to God. Rather, he becomes a mere salesman subjected to the whims of his materialistic customers, a salesman, who will depict Krsna, the Supreme Lord according to the latest fashion and not as He truly is. In this way, the spiritual institution becomes dead and no amount of reformatory planning commissions can bring it to life.
Without a driver, a car can never move. It will stay in one spot for millions of years. A thief might steal it, but he will only use the car for his nefarious activities and therefore the purpose of the car is lost. The original owner however is not specifically concerned with the car. His first concern is to accomplish his task of moving himself and his good friends to his destination. He might therefore take advantage of another car. Similarly, the powerful saint whose instructions might not be followed by one group of his disciples might inspire another group outside of his original institution to accomplish his task-namely to enlighten the humanity about the real purpose of life-devotional service to the Lord with the purpose of transferring them back home, back to the spiritual world. The Bhaktivedanta Lives in Sound Society proclaims to be nothing, but such a new vehicle for the divine spiritual master His Divine Grace A.C.Bhaktivedanta Swami Prabhupada (Srila Prabhupada).