Only a fully surrendered soul to Kṛṣṇa is able to get out of the contamination of māyā. Therefore such surrendered soul can understand what is Kṛṣṇa, not others. Not others.
- yaṁ vai na gobhir manasāsubhir vā
- hṛdā girā vāsu-bhṛto vicakṣate
- ātmānam antar-hṛdi santam ātmanāṁ
- cakṣur yathaivākṛtayas tataḥ param
- (SB 6.3.16)
Tan māyā-mohitam, mohitād na jānanty ity uktam.
So the conclusion is that nāhaṁ prakāśaḥ sarvasya yogamāyā-samāvṛtaḥ (BG 7.25). Kṛṣṇa says: "I am not revealed to everyone." Yogamāyā. Therefore very few person can understand what is Kṛṣṇa. Kṛṣṇa does not reveal Himself. Those who are devotees . . . sevonmukhe hi jihvādau svayam eva sphuraty adaḥ (Brs. 1.2.234). Those who are actually devotees, dedicated the life and everything for Kṛṣṇa, for them only, Kṛṣṇa reveals: "Yes, I am like this."
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.