Prabhupāda: Somebody says that "Kṛṣṇa appeared five thousand years ago. He's no longer present. Then how we shall execute Kṛṣṇa's order?" Kṛṣṇa's order can be executed by executing the order of the spiritual master. Yasya prasādād bhagavat-prasādo **. We cannot disobey. Yasyaprasādād na gatiḥ kuto 'pi. This is the process. In Caitanya-caritāmṛta it has been very extensively explained what is the position of the spiritual master. But at the same time, the spiritual master does not accept himself as he's God or Kṛṣṇa like the Māyāvādīs. No. the bona fide spiritual master always thinks of himself as the servant of the servant of the servant of Kṛṣṇa. Gopī-bhartuḥ pada-kamalayoḥ dāsa-dāsānudāsaḥ [Cc. Madhya 13.80]. Not that "Because my disciples accept me as good as Kṛṣṇa, and because my disciples offer me respect exactly he offers respect to Kṛṣṇa..." That does not mean I am Kṛṣṇa. I am servant of the servant of the servant of Kṛṣṇa. This is the position. Go on.
Pradyumna: "The connection with the spiritual master is called initiation. From the date of initiation by the spiritual master, the connection between Kṛṣṇa and a person cultivating Kṛṣṇa consciousness is established. Without initiation by a bona fide spiritual master, the actual connection with Kṛṣṇa consciousness is never performed."
Prabhupāda: Yes. We must connect with the current. Just like you have heated your room with electrical wires, but if you do not touch it with the current going on, then simply electrical heating with not help you. Similarly, initiation is essential. Ādau gurvāśrayam. Śrīla Rūpa Gosvāmī recommends in his Bhakti-rasāmṛta-sindhu for executing proper spiritual life, one must take shelter of the bona fide spiritual master. Tasmād guruṁ prapadyeta jijñāsuḥ śreyaḥ uttamam [SB 11.3.21]. Person who is actually interested in uttamam. Uttamam means transcendental. Udgata-tamam. After darkness. This material world is darkness. Tamasi mā jyotir gamaḥ. The spiritual world is full of light. Therefore anything spiritual, that is called uttamam.