I (the soul) am a part of Hari, the source of everything that exists. Beyond Him there is no other cause, and there is no other effect. For one who is aware of this truth, there is neither birth nor rebirth, nor the dualities of suffering and joy.
— Viṣṇu-purāṇa, 1.22.86

I bow down to the supreme Śrī Hari. Chanting His name destroys all sins, and reverential prostration to 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 wise give it many names.
— Ṛg Veda, 1.164.46

To those who are constantly devoted to Me and worship Me with intense love, I give the understanding by which they can come to Me.
— Bhagavad-Gītā, 10.10

Thus engaged, while chanting the beloved name of the Lord, the heart of a devotee melts in deep love, and he cries out loudly. He laughs, weeps, calls, and sings; like a madman, he dances, without concern for the world around him.
— Bhāgavata-purāṇa, 11.2.40

In this material world, to serve 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 highest goal of human life, as all revealed scriptures declare.
— Bhāgavata-purāṇa, 7.7.55

Only by undivided and exclusive devotion, O Arjuna, is it possible to truly know Me, to see Me, and to enter My abode. Whoever serves Me, considers Me the Supreme, who is My devotee, free from attachment and without malice towards any living being, he will come to Me, O Arjuna.
— Bhagavad-gītā, 18.54–55

By remembering Śrī Hari, the destroyer of all sins, and reminding one another of Him, they cultivate devotion, which arises through devotion itself, and their bodies are seized by ecstasy.
— Bhāgavata Purāṇa, 11.3.31

The pure devotees or great saintly persons who desire to achieve the highest goal of life and 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

Just try to learn the truth by approaching a spiritual master. Inquire from him submissively and render service unto him. The self-realized souls can impart knowledge unto you because they have seen the truth.
— Bhagavad-gītā, 4.34

One who has accepted an ācārya, a guru, can understand the Supreme Personality of Godhead.
— Chāndogya Upaniṣad, 6.14.2

Unto those great souls who have implicit faith in both the Lord and the spiritual master, all the imports of the Vedic scriptures are automatically revealed.
— Śvetāśvatara Upaniṣad, 6.23

Whoever, in My opinion, studies this dialogue of ours, the Bhagavad-gītā, which is founded on Dharma, worships Me through the sacrifice of knowledge. And whoever hears it with faith and free from envy will also be liberated and attain the auspicious worlds where those who have performed virtuous deeds reside.
— Bhagavad-gītā, 18.70–71

The teachings of the Lord, the recitation by His disciples, and the various secret instructions about the Supreme Self, as revealed by Him, are truly the highest.
— Kūrma-purāṇa, 2.44.113