Srila Prabhupada: My Guru Maharaja used to say that this material world is not fit for living for any gentlemen. He used to say, “no gentlemen can live here.” So these things are not understood by the non-devotees, how much pinching this material world is. Unless one becomes detestful of this material world, it is to be understood that he has not yet entered in the spiritual understanding.
Morning class. Mayapur 2/22/76
Niranjana Swami: Everything becomes valuable when it is seen as helping us to increase our attachment to the most valuable object, Krishna. Anything that distracts our minds from Krishna has no value and should be rejected. But the materialists see the complete opposite; they ascribe value to things that take them away from Krishna.“ (Lectures from a Disciple, Volume 2)
Indradyumna Swami: “In the association of pure devotees, discussion of the pastimes and activities of the Supreme Personality of Godhead is very pleasing and satisfying to the ear and the heart. By cultivating such knowledge one gradually becomes advanced on the path of liberation, and thereafter he is freed, and his attraction becomes fixed. Then real devotion and devotional service begin.” (Srimad Bhagavatam).