How should a Disciple React to the Disappearance of His Spiritual Master? Srila Prabhupada answers….
Prabhupada: Figuratively the queen is supposed to be the disciple of the king; thus when the mortal body of the spiritual master expires, his disciples should cry exactly as the queen cries when the king leaves his body. However, the disciple and spiritual master are never separated because the spiritual master always keeps company with the disciple as long as the disciple follows strictly the instructions of the spiritual master. This is called the association of vani (words). Physical presence is called vapuh. As long as the spiritual master is physically present, the disciple should serve the physical body of the spiritual master, and when the spiritual master is no longer physically existing, the disciple should serve the instructions of the spiritual master.
>>> Ref. VedaBase => SB 4.28.47
Prabhupada: Just as a devoted wife becomes afflicted at the passing away of her husband, when a spiritual master passes away, the disciple becomes similarly bereaved.
SB 4.28.50
>>> Ref. VedaBase => SB 4.28.50
Prabhupada: When the brahmana asked the woman who the man lying on the floor was, she answered that he was her spiritual master and that she was perplexed about what to do in his absence. At such a time the Supersoul immediately appears, provided the devotee is purified in heart by following the directions of the spiritual master. A sincere devotee who follows the instructions of the spiritual master certainly gets direct instructions from his heart from the Supersoul. Thus a sincere devotee is always helped directly or indirectly by the spiritual master and the Supersoul. This is confirmed in Caitanya-caritamrta: guru-krsna-prasade paya bhakti-lata-bija. If the devotee serves his spiritual master sincerely, Krsna automatically becomes pleased. Yasya prasadad bhagavad-prasadah. By satisfying the spiritual master, one automatically satisfies Krsna. Thus the devotee becomes enriched by both the spiritual master and Krsna. The Supersoul is eternally the friend of the living entity and always remains with him. The Supersoul has always been ready to help the living entity, even before the creation of this material world. Thus the Supersoul has been accompanying the living entity since before the creation.
>>> Ref. VedaBase => SB 4.28.52
Prabhupada: Unfortunately, when the ācārya disappears, rogues and nondevotees take advantage and immediately begin to introduce unauthorized principles in the name of so-called svāmīs, yogīs, philanthropists, welfare workers and so on. The main business of human society is to think of the Supreme Personality of Godhead at all times, to become His devotees, to worship the Supreme Lord and to bow down before Him. The acarya, the authorized representative of the Supreme Lord, establishes these principles, but when he disappears, things once again become disordered. The perfect disciples of the acarya try to relieve the situation by sincerely following the instructions of the spiritual master.
>>> Ref. VedaBase => SB 4.28.48