Prabhupāda: Unity is possible on the spiritual platform, not on the material platform. Material platform means "I am envious of you; you are envious of me." Mātsaratā. Mātsaratā means mātsaratā para utkarṣaḥ asahanam... When I cannot tolerate other increasing in opulence, I become envious. This is material life. The spiritual life is different. Spiritual life means if somebody has advanced in spiritual life, and somebody, one, he is still in the neophyte stage, he will eulogize, "Oh, how fortunate he is. He has advanced. He is serving Kṛṣṇa in such a nice way. When I can get that position." There is no enviousness. That is glorifying. That is the distinction between material life and spiritual life. Material life means enviousness: "How to kill you, how to stop you." But spiritual life means to see you advancing, one becomes happy, "Oh, how fortunate he is." This is spiritual life. Therefore spiritual life is meant for a person who is completely not envious. That is spiritual life. Paramo nirmatsarāṇāṁ satāṁ vāstavaṁ vastu vedyam atra. Dharmaḥ projjhita-kaitavo 'tra (SB 1.1.2). This Bhāgavata-dharma is meant for the person, paramo nirmatsara, paramahaṁsa. He is not envious of anyone. Suhṛdaḥ sarva-dehinām (friendly to all living entities).
(Srila Prabhupada Lecture, Bombay, December 25, 1974)