The material world, which is moving under the spell of the three modes of nature, is also a manifestation of His energy. parāsya śaktir vividhaiva śrūyate: everything that we see is an interaction of His energies (Śvetāśvatara Upaniṣad 6.8 (Cc. Madhya 13.65, purport)). parasya brahmaṇaḥ śaktis tathedam akhilaṁ jagat. This is the version of the Viṣṇu Purāṇa. We can understand that whatever we see is an interaction of the three modes of material nature, but actually it is all an interaction of the Lord's energy. Loka-pālam: He is actually the maintainer of all living entities. Nityo nityānām: He is the chief of all living entities; He is one, but He maintains many, many living entities. God maintains all other living entities, but no one can maintain God. That is His svacchanda-śakti; He is not dependent on others. Someone may call himself independent, but he is still dependent on someone higher. The Personality of Godhead, however, is absolute; there is no one higher than or equal to Him.
(Srimad Bhagavatam-----3:24:33-----purport).

It is said that by proper understanding of the pure self, or by self-realization, one can be freed from material attachment. Knowledge leads one to attain the ultimate perfection of life and to see oneself as he is. The Śvetāśvatara Upaniṣad (3.8) also confirms this. Tam eva viditvāti-mṛtyum eti: simply by understanding one's spiritual position, or by seeing oneself as he is, one can be freed from material entanglement. In various ways, the seeing of oneself is described in the Vedic literatures, and it is confirmed in the Bhāgavatam (puruṣasya ātma-darśanam) that one has to see oneself and know what he is. As Kapiladeva explains to His mother, this "seeing" can be done by hearing from the proper authoritative source. Kapiladeva is the greatest authority because He is the Personality of Godhead, and if someone accepts whatever is explained as it is, without interpretation, then he can see himself.
(Srimad Bhagavatam-----3:26:2-----purport).

Thus the Vedas (Śvetāśvatara Upaniṣad 6.23) enjoin that for one who has unflinching faith in the lotus feet of the Lord, as well as in the spiritual master, the real import of Vedic knowledge can be revealed.
(Srimad Bhagavatam-----3:24:52-----purport).

As stated by Viśvanātha Cakravartī Ṭhākura, yasya prasādād bhagavat-prasādaḥ: ** if one wants actual success in life, he must strictly follow the instructions of the spiritual master. By following such instructions, one is sure to make rapid progress in spiritual life. This statement by Viśvanātha Cakravartī is in pursuance of the following injunction from the Śvetāśvatara Upaniṣad (6.23):
yasya deve parā bhaktir
yathā deve tathā gurau
tasyaite kathitā hy arthāḥ
prakāśante mahātmanaḥ
(ŚU 6.23)
"Only unto those great souls who have implicit faith in both the Lord and the spiritual master are all the imports of Vedic knowledge automatically revealed." In the Chāndogya Upaniṣad it is said, ācāryavān puruṣo veda: "One who approaches a bona fide spiritual master can understand everything about spiritual realization."
(Srimad Bhagavatam-----3:28:65-----purport).

"If one has unflinching faith in the Supreme Lord and the spiritual master, the essence of all Vedic knowledge is revealed to him. (Śvetāśvatara Upaniṣad 6.23) A devotee always thinks of the Lord continuously. While chanting the Hare Kṛṣṇa mantra, the words Kṛṣṇa and Hare immediately remind him of all the Lord's activities. Since his entire life is engaged in the service of the Lord, a devotee cannot forget the Lord at any time. Just as an ordinary man always engages his mind in material activities, a devotee always engages his mind in spiritual activities. This is called brahma-satra, or meditating upon the Supreme Lord always. Prince Priyavrata was perfectly initiated into this practice by Śrī Nārada.
(Srimad Bhagavatam-----5:1:6-----purport).

Similarly, whatever a brāhmaṇa speaks cannot be changed. It must act. The learned sages who were priests at Mahārāja Nābhi's sacrifice were not only brāhmaṇas but were so qualified that they were like devas, demigods, or God Himself. If this were not the case, how could they invite Lord Viṣṇu to come to the sacrificial arena? God is one, and God does not belong to this or that religion. In Kali-yuga, different religious sects consider their God to be different from the God of others, but that is not possible. God is one, and He is appreciated according to different angles of vision. In this verse the word kaivalyāt means that God has no competitor. There is only one God. In the Śvetāśvatara Upaniṣad (6.8) it is said, na tat-samaś cābhyadhikaś ca dṛśyate: "No one is found to be equal to Him or greater than Him." That is the definition of God.
(Srimad Bhagavatam-----5:3:17-----purport).

When one understands that the Lord is situated in everyone's heart and actually sees the Lord present everywhere, he has perfect knowledge. The word jāta-vedaḥ means "fire which is produced by rubbing wood." In Vedic times, learned sages could bring forth fire from wood. Jāta-vedaḥ also indicates the fire in the stomach, which digests everything we eat and which produces an appetite. The word gūḍha is explained in the Śvetāśvatara Upaniṣad. Eko devaḥ sarva-bhūteṣu gūḍhaḥ: The Supreme Personality of Godhead is understood by chanting the Vedic mantras. Sarva-vyāpī sarva-bhūtāntar-ātmā: He is all-pervading, and He is within the heart of living entities. Karmādhyakṣaḥ sarva-bhūtādhivāsaḥ: He witnesses all activities of the living entity. Sākṣī cetā kevalo nirguṇaś ca: The Supreme Lord is the witness as well as the living force, yet He is transcendental to all material qualities.
(Srimad Bhagavatam-----5:18:36-----purport).

Nivṛtta-dvaita-dṛṣṭaye: in our conditioned life our bodies have different parts, but although Kṛṣṇa apparently has different bodily parts, no part of His body is different from any other part. Kṛṣṇa can see with His eyes, and Kṛṣṇa can see without His eyes. Therefore in the Śvetāśvatara Upaniṣad it is said, paśyaty acakṣuḥ. He can see with His hands and legs. He does not need a particular bodily part to perform a particular action. Aṅgāni yasya sakalendriya-vṛttimanti: He can do anything He desires with any part of His body, and therefore He is called almighty.
(Srimad Bhagavatam-----5:16:18-19-----purport).

"Only unto those great souls who have implicit faith in both the Lord and the spiritual master are all the imports of Vedic knowledge automatically revealed." (Śvetāśvatara Upaniṣad 6.23)
yam evaiṣa vṛṇute tena labhyas
tasyaiṣa ātmā vivṛṇute tanūṁ svām
"The Lord is obtained only by one whom He Himself chooses. To such a person He manifests His own form." (Muṇḍaka Upaniṣad 3.2.3)
These are Vedic injunctions. One must take shelter of a self-realized spiritual master, not a materially educated scholar or politician. One must take shelter of a niṣkiñcana, a person engaged in devotional service and free from material contamination. That is the way to return home, back to Godhead.
(Srimad Bhagavatam-----7:5:32-----purport).

"Unto those great souls who have implicit faith in both the Lord and the spiritual master, all the imports of Vedic knowledge are automatically revealed." (Śvetāśvatara Upaniṣad 6.23)
ataḥ śrī-kṛṣṇa-nāmādi
na bhaved grāhyam indriyaiḥ
sevonmukhe hi jihvādau
svayam eva sphuraty adaḥ
"No one can understand Kṛṣṇa as He is by the blunt material senses. But He reveals Himself to the devotees, being pleased with them for their transcendental loving service unto Him."
(Srimad Bhagavatam-----7:7:17-----purport).

"Unto those great souls who have implicit faith in both the Lord and the spiritual master, all the imports of Vedic knowledge are automatically revealed." (ŚvetāśvataraUpaniṣad 6.23) One must accept the pure devotee, the representative of God, as one's guru and then offer him all the respects one would offer the Supreme Personality of Godhead. This is the secret of success. For one who adopts this method, the perfect process is revealed. In this verse, the words yair añjasā ratiḥ indicate that by offering service and surrendering to the spiritual master, one is elevated to devotional service, and by performing devotional service one gradually becomes attached to the Supreme Personality of Godhead. Because of this attachment to the Lord, one can understand the Lord. In other words, one can understand what the Lord's position is, what our position is and what our relationship is. All this can be understood very easily by the simple method of bhakti-yoga. As soon as one is situated on the platform of bhakti-yoga, the root cause of one's suffering and material bondage is destroyed. This is clearly explained in the next verse, which gives the secret of success.
(Srimad Bhagavatam-----7:7:29-----purport).