I (the soul) am part of Hari, the source of all that exists. Beyond Him, there is no other cause or effect. For one who is aware of this truth, there is no longer birth or rebirth, nor the dualities of sorrow and joy.

- Viṣṇu-purāṇa, 1.22.86

I bow before the supreme Śrī Hari; the chanting of His Name destroys all sins, and reverent prostration before Him removes all suffering.

- Bhāgavata-purāṇa, 12.13.23

He is Hari, the supreme person, the heroic, Kṛṣṇa, the victorious, and the lord of all beings.

- Harivaṃśa, 3.111.1

Truth is one, but the sages give it many names.

- Ṛg Veda, 1.164.46

To those who are constantly engaged with Me, and who worship Me with intense Love, I give the consciousness by which they can come to Me.

- Bhagavad-Gītā, 10.10

Thus dedicated, reciting the beloved Name of the Lord, the heart of a devotee melts in deep love, and he cries out aloud. He laughs, weeps, cries out and sings; like one mad with love, he dances, oblivious to the world.

- Bhāgavata-purāṇa, 11.2.40

In this material world, to render service to the Lotus Feet of Govinda, the cause of all causes, and to see Him everywhere, is the only goal of life. This alone is the supreme goal of human life, as all the revealed scriptures explain.

- Bhāgavata-purāṇa, 7.7.55

Only through single-minded and exclusive devotion, Arjuna, is it possible to truly know, see and enter My Abode. Whoever serves Me, regards Me as the highest, whoever is My devotee, is free from attachments and shows no malice towards any living being, will come to Me, O Arjuna.

- Bhagavad-gītā, 18.54-55

Remembering and reminding one another of Śrī Hari, who removes all sins, they cultivate devotion, which arises through devotion itself, and they sustain bodies thrilled with ecstasy.

- Bhāgavata-purāṇa, 11.3.31

The pure devotees or the great saintly persons who wish to attain the highest goal of life and who are completely free from all material desires for sense gratification constantly engage in the transcendental service of Your Lotus Feet.

- Bhāgavata-purāṇa, 8.12.6

One should approach a spiritual teacher with surrender, a deep eagerness to learn, and service. Such realised souls can instruct you, for they have seen the Truth.

- Bhagavad-gītā, 4.34

Whoever has accepted an ācārya (guru) can know the Supreme Lord.

- Chāndogya Upaniṣad, 6.14.2

To that great soul who has great devotion to the Lord and equal devotion to the guru, the meanings of the matters treated in the scriptures are revealed.

- Śvetāśvatara Upaniṣad, 6.23

In My opinion, whoever studies this dialogue of ours (the Bhagavad-gītā) based on dharma worships Me through the sacrifice of knowledge. And whoever hears it with faith and free from envy will also be liberated and will attain the auspicious realms where those who have performed virtuous actions dwell.

- Bhagavad-gītā, 18.70-71

The teachings of the Lord, the recitation of His disciples and the various secret teachings of the Supreme Self, as He has revealed them, are truly the highest.

- Kūrma-purāṇa, 2.44.113