Pradyumna: Translation: "Arjuna's constant remembrance of the lotus feet of Lord Śrī Kṛṣṇa rapidly increased his devotion, and as a result all the trash in his thoughts subsided." (SB 1.15.29)
Prabhupāda: So material existence means full of anxieties. This is the sum and substance of material existence. Everyone is full of anxieties. Not only humans. Just like Karandhara was speaking, there are so many bad news. What is that? Where is Karandhara?
Karandhara: Energy crisis, food shortage.
Prabhupāda: Yes, energy crisis, food shortage, and what else?
Karandhara: Economic turmoil.
Prabhupāda: Hm. And even Mr. Nixon is in such exalted post, he's also full of anxiety, when he'll be kicked out. You see. So find out any man who is not in anxiety. Not only human being but also animals, birds, beasts—everyone. That is the symptom of material existence, anxieties.
So spiritual life means anxiety-less. This is the difference between material life and spiritual life. Brahma-bhūtaḥ prasannātmā (BG 18.54), in the Bhagavad-gītā it is described what is spiritual life. As soon as you are identified with the Absolute Truth, Brahman, then symptoms will be prasannātmā, jubilation: "Oh, I do not belong to this material world. I belong to the spiritual world. I am part and parcel of Kṛṣṇa. Why should I suffer so many things?" That is jubilation. Brahma-bhūtaḥ prasannātmā (BG 18.54). The prasannātmā means na śocati na kāṅkṣati. He has no lamentation, no hankering. Here people are always full of anxieties because they have got hankering, "I want this. I want that." And there is lamentation. What they possess, if it is lost, they cry, "Oh, my things are lost." And what they do not possess, they hanker. So their anxiety is there, either he possesses or not possesses. This is material anxiety. If you have no money, then you will hanker after money, "How to get money, how to get money, how to get money?" And when you get money, then how to utilize it, how to, where to keep it, in the bank, or in the house, or who will take away? Somebody will take away. So where is anxiety-less? You possess or not possess, the real disease is anxiety. So when one becomes brahma-bhūta (SB 4.30.20), self-realized, identified with the Absolute Truth, then he has no more anxiety. This is the best education, when you become anxiety-less. That is perfection of education.