BG Chap 10 - Kṛṣṇa alone knows Himself
Kṛṣṇa is addressed as Keśava, which means He binds up even Brahmā and Śiva by hiding the knowledge of His true self. Ka means Brahmā, and īśa means Śiva. Va stands for vayase, which means to bind, from the root ve. If even Brahmā and Śiva cannot know Kṛṣṇa’s true nature, the other devas and the demons certainly cannot know it. The sages think that Kṛṣṇa is without birth. They do not know about His birth, not understanding how His svarūpa of para brahma could be both unborn and born. The devas and dānavas disregard and insult Him by thinking that He is like others.
Kṛṣṇa alone knows Himself by His internal potency. Those who are devotees among the devas and dānavas substantially know His form as described but do not know that form as it really is. Kṛṣṇa is the Lord of all men (puruṣottama) because He is the source of all living beings (bhūta-bhāvana). Though he is the source of all beings, He may not be respected. Thus Arjuna addresses Him as the controller of all beings (bhūteśa). Although He is the controller, he may not be worthy of worship. Therefore Arjuna says Kṛṣṇa is worshipped by those who are worthy of worship (deva-deva). Though a person is worthy of worship, he may not protect others, just like the devas who sometimes do not give protection. Thus Arjuna says that Kṛṣṇa is the protector of the universe (jagat-pate), by giving means of livelihood and teachings to both the good and evil people.
The devotee knows that Kṛṣṇa has birth and also birthless, but does not know by which method it can happen. Only Kṛṣṇa knows Himself thru Himself and not thru any other means. Thus among all puruṣa-avatāras, who create the mahat-tattva and other elements, Kṛṣṇa is the supreme (puruṣottama). Kṛṣṇa is the Lord of all lords up to Brahmā, who are creators of all material bodies (bhūta bhāvana bhūta īśa). He is also the performer of pastimes (deva, which comes from the root div meaning one who plays), taking the devas as instruments in His pastimes (deva-deva). Kṛṣṇa, out of His infinite mercy, is also the master of all people living within the universe (jagat-pate)