Teṣāṁ satata-yuktānāṁ bhajatāṁ prīti-pūrvakam (BG 10.10). Those who are twenty-four hours engaged in the devotional service—not as a routine, but with faith and love—bhajatāṁ prīti-pūrvakam. Not that official. Official, he cannot understand. But one who is serving the Deity with love and faith, to him only, Kṛṣṇa will reveal, and He will give intelligence. Kṛṣṇa is very intelligent. Kṛṣṇa ye bhaje . . . only intelligent men can worship Kṛṣṇa.
So here it is said, yaṁ vai na gobhir manasāsubhir vā hṛdā girā vāsu-bhṛto vicakṣate. Tan māyā-mohitād na jānanty ity uktam, avaśed tata tasya ityāhayam iti. Gobhir indriyair cittena na vicakṣata na paśyanti. So gobhiḥ, by sensual gymnastic or mental speculation, the Supreme Personality of Godhead cannot be understood. There are many mental speculator, just like Aurobindo Ghosh. So he speculated.
He understood that there are activities even after liberation, but he could not understand Kṛṣṇa, so hard it is. Others, the so-called sannyāsīs, just like Ramatirtha or Vivekananda, they could not approach even, in the modern age. And the Aurobindo, he approached up to the Brahman liberation, but he could not approach to the understanding of the Supreme Personality of Godhead.
That is . . . Arjuna says also in the Bhagavad-gītā, "It is very difficult to understand Your personality." Everyone becomes . . . the other day in the Melā, Māgha-melā, one Gangeshvarananda, retired high-court judge, he said that, "This is the first time, Swāmījī, that we are hearing from you on solid basis about the Personality." The whole world, nirviśeṣa-śūnyavādi . . . nirviśeṣa . . . means the impersonalists and voidists, that's all. They have no understanding what is Personality of Godhead.
Gobhir indriyair hṛdā cittena na vicakṣate. One cannot, gobhiḥ, by exercise of the senses. Gobhiḥ and indriyair hṛdā, heart also, meditation. The jñānīs, the speculators, they are speculating by sensual activities, and the yogīs, they are trying to find out the Supreme within the heart, cittena. So na paśyanti: "But they cannot see." They cannot see.
So jñānīs, the yogīs, they cannot understand. Although they are trying for it, they cannot understand. It is clearly said, hṛdā girā vāsu-bhṛto vicakṣate. Yad vāca nābhūd dhṛtaṁ yan manaḥ manute ityādi śruteḥ. And he is giving recitation from the Vedas, yad vāca nābhūd dhṛtaṁ yan manaḥ manute ityādi śruteḥ, that avāṅ mānasa-gocaraḥ: He is beyond the reception of mental speculation or philosophical topics.
Ātmānaṁ jīvanam ātmānaṁ drastaram yam ākṛte rūpāṇi cakṣur yathā karmabhūt na jānanti. Tataḥ param ākṛte nāyaṁ prakāśakaṁ nāhi pramattaḥ pranmanasya viṣaya iti bhāvam. Evaṁ bhūta parameśvara mad-anyasyeti pūrvenaiva sambandhaḥ. So he is trying to explain about his master, so that it is not very easily understood.
That was the point of Yamarāja to his assistants that, "People like you, they think that Yamarāja . . . I am the supreme. But that's not a fact. The fact is I am also controlled by another supreme master." And how to know Him, he is describing. He is describing that "It is not possible to know Him in this way. It is not possible in this way. Even great sages and ṛṣis, they could not understand in this way."
Yam evaiṣa vṛṇute . . . nāyam ātmā pravacanena labh . . . (Kaṭha Upaniṣad 1.2.23). This is Vedic injunction. Simply by talking, becoming a very nice speaker or lecturer, you cannot understand the Supreme. Nāyam ātmā na medhayā. Because you have got very nice brain, therefore you will be able to understand—no. Na medhayā. Nāyam ātmā pravacanena labhyo na medhayā na. Then how? Yam evaiṣa vṛṇute tena labhyaḥ-labhyaḥ (Kaṭha Upaniṣad 1.2.23): "Only such person who is favored by the Supreme Personality of Godhead, he can understand." He can understand. Otherwise, nobody can understand.
So therefore our business should be how to get His favor. And that favor, that is very easy to understand, that if you surrender to a person, then you can get his favor—otherwise not. This is process of understanding the Supreme Personality.