If you want actual peace, ātmā, suprasīdati, then you have to accept paro dharma. Para means supreme or superior. There are two kinds of dharmas: parā and aparā. Aparā means this material world. Bhūmir āpo 'nalo vāyuḥ khaṁ mano buddhir eva ca (BG 7.4). There are two natures: one spiritual nature and one material nature. People do not understand what is spiritual nature. But Kṛṣṇa explains very nicely, and one can understand very easily what is spiritual nature and what is material nature. In the Bhagavad-gītā, the matter, five elements—earth, water, air, fire, sky, mind, intelligence, ego—these are material nature. Prakṛti me bhinnā aṣṭadhā. Apareyam. Then Kṛṣṇa says this is aparā. Aparā means inferior. Bhūmir āpo 'nalo vāyuḥ. The modern scientist or philosophers, they are engaged in studying this inferior nature. They have no information of the superior nature. But Kṛṣṇa says that these five elements . . . eight elements: five gross and three subtle. The mind is also material. Khaṁ mano buddhir. These are material. People think this mental speculation, poetry, philosophy, that is spiritual. No. So long the subject matter is material, the concoction of the mind, speculation of the mind, the so-called philosophy, is also material.
When mind is engaged at the lotus feet of the Lord . . . as it is stated in the Śrīmad-Bha . . . sa vai manaḥ kṛṣṇa-padāravindayor (SB 9.4.18). When the mind is fixed up in the lotus feet of the Lord, then the words are used, the vibration of the tongue used . . . vacāṁsi vaikuṇṭha-guṇānuvarṇane. Then the words are utilized for describing about the spiritual world. (coughs) The spiritual world is called Vaikuṇṭha. There is no kuṇṭha, anxiety. That is spiritual world. When you become spiritualized, brahma-bhutaḥ prasannātmā (BG 18.54), there is no more kuṇṭha. This is the sign of becoming brahma-bhūtaḥ. At the present moment we are jīva-bhūtaḥ. Manaḥ saṣṭhānīndriyāṇi prakṛti-sthāni karṣati (BG 15.7). Therefore our struggle for existence is with the mind and the six senses. But when your existence is spiritualized, then brahma-bhūtaḥ, you have no more anxieties. That is the sign. Brahma-bhūtaḥ prasannātmā na śocati na . . . prasannātmā means na śocati na kāṅkṣati (BG 18.54).