1 / Yoga and the Master of Yoga
Yoga  means the connecting link between the soul and the upersoul, or the Supreme and the minute living creatures. Lord Śrī Kṛṣṇa is that Supreme, the Personality of Godhead. Being, therefore, the ultimate object of  yoga , Kṛṣṇa's name is  ogeśvara , the master of  yoga .
At the conclusion of the  Bhagavad-gītā , it is said: "Where there is Kṛṣṇa, and where there is Arjuna, the greatest of bowmen, there, undoubtedly, is victory."
The  Bhagavad-gītā  is a narrative spoken by Sañjaya, the secretary of Mahārāja Dhṛtarāṣṭra. This is just like airwaves from the radio: the play is going on in the auditorium, but you can hear from your room. So, just as we now have such a mechanical arrangement, at that time there were also certain arrangements, although there was no machine. Anyway, the secretary of Dhṛtarāṣṭra could see what was going on in the battlefield, and he was in the palace, telling this to Mahārāja Dhṛtarāṣṭra, who was blind. Now, the conclusion made by Sañjaya was that Kṛṣṇa is the Supreme Personality of Godhead.
When the  yoga  performance is described, it is said that Kṛṣṇa's name is  yogeśvara . No one can be a better  yogin  than the master of  yoga , and Kṛṣṇa is the master. There are many different types of  yoga .  Yoga  means the system, and  yogin  means the person who practices that system. The object of  yoga , the ultimate goal, is to understand Kṛṣṇa. Therefore, Kṛṣṇa consciousness means to practice the topmost type of  yoga .