Bhagavad Gita

ಅರ್ಜುನ ಉವಾಚ
ಸ್ಥಿತಪ್ರಜ್ಞಸ್ಯ ಕಾ ಭಾಷಾ ಸಮಾಧಿಸ್ಥಸ್ಯ ಕೇಶವ ।
ಸ್ಥಿತಧೀಃ ಕಿಂ ಪ್ರಭಾಷೇತ ಕಿಮಾಸೀತ ವ್ರಜೇತ ಕಿಮ್ ॥೫೪॥
arjuna uvāca
sthitaprajñasya kā bhāṣā samādhisthasya keśava |
sthitadhīḥ kiṃ prabhāṣeta kimāsīta vrajeta kim ||54||

Gist of the sloka:
Arjuna says: O the controller of Brahma and Rudra [Keshava], how does one recognize the person, who is in ‘samadhi’ state and has realized the Lord? How does one recognize such a ‘stitha-pragna’? How does he speak? How does he sit? How does he walk?
One who has realized the Lord, he would have reached the state equal mindedness and is known as stitha-pragna. Due to the God realization, he would have reached inner peace and bliss and would continue to remain so. That state is known as samadhi state.
Arjuna wants to know how to recognize such person?
It is well neigh impossible to recognize a person who has reached the state of samadhi. For his achievement and qualities is related to his inner mental state and not visible to others outside by his dress, talk or actions. He who has no attachment to the outside world would rarely interact with it. Hence, Arjuna’s questions.
Arjuna calls Lord Krishna as Keshava. Arjuna by calling Lord as Keshava demonstrates the fact that the Lord is supreme and controller of both Brahma, Rudra and rest of universe. Keshava means one who gives the power of creation and destruction to Brahma and Rudra [and other sets of powers to the demi-Gods]. Like the sun which illuminates the world, Lord Krishna is Keshava.
Arjuna is indicating/requesting to the Lord, that He who provides the light of knowledge to the universe is the right person to guide him in these matters. For there is no one else who can have superior knowledge, than Lord Krishna.