Whatever a person may be in the estimation of the social order of things, if he tries to reciprocate a feeling of love towards the Supreme Personality of Godhead and is satisfied with the blessings of the Lord, he will at once feel the highest peace of mind, for which he is hankering life after life. Peace of mind, or in other words the healthy state of mind, can be achieved only when the mind is situated in the transcendental loving service of the Lord.
His Divine Grace A. C. Bhaktivedanta Swami Prabhupada
Srimad-Bhagavatam, 2.6.6, Purport

Those who desire liberation from material existence and who wish to become eternally happy should always chant Krishna’s holy name. This is Mahaprabhu’s order. Therefore the devotees consider themselves servants of the holy name, every living entity as meant for Krishna’s enjoyment, and every object as meant for His service.
Srila Bhaktisiddhanta Sarasvati Thakura
Amrita Vani, Section: “Chanting the Holy Name”

The forgetful conditioned soul is educated by Krishna through the Vedic literatures, the realized spiritual master and the Supersoul. Through these, he can understand the Supreme Personality of Godhead as He is, and he can understand that Lord Krishna is his eternal master and deliverer from the clutches of maya. In this way one can acquire real knowledge of his conditioned life and can come to understand how to attain liberation.
Sri Chaitanya Mahaprabhu
Sri Chaitanya-charitamrita, Madhya-lila 20.123

Embodied beings experience the reactions of positive and negative mental acts through the mind, the reactions of positive and negative physical acts through the body, and the result of positive and negative vocal acts through the organ of speech.
Manu-samhita 12.8

Om. O Sri Vishnu! By chanting Your name, which is conscious and glorious, we who have little knowledge about the name attain true insight. This name is eternal.
Rig Veda 1.156.3

One should take shelter of Lord Hari, Krishna. One should not take shelter of anyone but Him. One should not strive to attain anyone but Him. One should not desire anyone but Him. One should not have any goal but Him.
Lord Shiva
Sanat-kumara-samhita 120

My dear King, the Personality of Godhead is the ultimate controller. He is the Supreme Soul and the supreme shelter of all beings. When meditated upon by those about to die, He reveals to them their own eternal spiritual identity.
Shukadeva Goswami
Srimad-Bhagavatam 12.3.50

Because human beings are creatures of faith, after death they each obtain a result according to their faith and sentiments. So let them have full faith in the Lord.
Chandogya Upanishad 3.14.2