A liberated person enjoys happiness by factual experience. He can, therefore, sit silently at any place and enjoy the activities of life from within. Such a liberated person no longer desires external material happiness. This state is called brahma-bhuta, attaining which one is assured of going back to Godhead, back to home.
His Divine Grace A. C. Bhaktivedanta Swami Prabhupada
Bhagavad-gita 5.24, Purport

In the material condition, the living entity is sometimes raised to higher planetary systems and material prosperity and sometimes drowned in a hellish situation. His state is exactly like that of a criminal whom a king punishes by submerging him in water and then raising him again from the water.
Sri Chaitanya Mahaprabhu
Sri Chaitanya-charitamrita, Madhya-lila 20.118

The living entity is eternal, as I am, and always exists within Me. But you should not artificially think, “Now I have seen the soul.” Rather, I, as the Supreme Personality of Godhead, will bestow this benediction upon you when you are actually qualified.
Lord Sri Krishna
Mahabharata, Moksha-dharma

Activities such as mystic trance, becoming one with the Supreme, and the religious principles of brahminism, such as speaking the truth and tolerance, have their own respective attractions, but when one becomes captivated by love of Krishna, the Supreme Personality of Godhead, all attraction for mystic power, monistic pleasure, and mundane religious principles becomes insignificant.
Srila Rupa Goswami
Lalita-madhava 5.2

The Supreme Personality of Godhead is limitless. He is transcendental knowledge, and He is the eternal transcendental reality. He is present in everyone’s heart. One who properly understands Him becomes blessed and all his desires are completely fulfilled.
Taittiriya Upanishad 2.1

The Supreme Lord manifested the material intelligence, senses, mind and vital air of the living entities so that they could indulge their desires for sense gratification, take repeated births to engage in fruitive activities, become elevated in future lives and ultimately attain liberation.
Srila Shukadeva Goswami
Srimad-Bhagavatam 10.87.2

May our mental functions always take shelter of Krishna’s lotus feet, may our words always chant His names, and may our bodies always bow down to Him and serve Him. Wherever we are made to wander about this world by the Supreme Lord’s will, in accordance with the reactions to our fruitive work, may our good works and charity always grant us love for Lord Krishna.
Nanda Maharaja and Other Cowherds
Srimad-Bhagavatam 10.47.66–67

Those who are eager to awaken their spiritual consciousness and who thus have unflinching, undeviated intelligence certainly attain the desired goal of life very soon.
Naradiya Purana
Quoted in the Bhakti-rasamrita-sindhu 1.2.103