In plain words
This face of Kṛṣṇa was shining with the light of ten million suns. Seeing this splendour of that divine light, Ghaṇṭākarṇa was quite lost to himself. Without his knowing it, he sat down on his knees. He threw down to one side all the weapons that were in his hand. He joined his two hands. “Great soul! Who are You?” Kṛṣṇa Himself said, “Do you not know who I am? Every day you are doing dhyāna; on whom are you doing dhyāna? You merely utter ‘Hari Om’ with the tongue alone, but on what are you doing dhyāna?” “I am doing dhyāna on the Paramātma, who is full of divine light,” he said. “That light itself has taken on this form,” said Kṛṣṇa. “My name is Kṛṣṇa,” He said. “Kṛṣṇa, Vāsudeva, Paramātma, Aprameya, giver of boons, Hari, Mukunda, I have seen You, I have found Your grace, I have gained the fruits of every happiness,” he said. You are Aprameya; You have no measures. Each one proves You by a measure of his own, but this is great folly. You are beyond all measure. One can measure even the ocean. No one has the right to measure God, saying He is like this or like that. That is why they called Him Aprameya. Aprameya: there are three measures, the measure of direct perception, the measure of inference and the measure of the word. He is the One who is beyond these three measures. The reason is that even the Veda, which is the measure of the word, goes only some of the way. After it passes that limit: “Yato vācā nivartante aprāpya manasā saha!” It is not possible to describe You by speech, or by the mind, or by any other kind of feeling. Not only that: the Veda also teaches that only after all these are given up will You be attained by me. O God! “Na karmaṇā na prajayā dhanena tyāgenaike amṛtatvam ānasuḥ.” If I wish to attain Your immortality, it is not by karmas. It is not by noble wealth. It is not by learning. It is not by tapas. It is not by charity and good works. It is by renunciation alone that this joy comes to me. All these too are of Prakṛti. All this that is of Prakṛti is only pravṛtti. That is, things that are born of the moment. And go that very moment.
A small example. You tell Me one thing, whether a person or a matter, that stays forever. Everything is something that changes. That is why, among all the things that change, there is one that does not change. That alone is the principle of the Ātma. When you wish to recognise it, you must turn your inner sight to suit it. However anyone may think of it, if there is no divine will, however strong a man may be, however virtuous, however learned, his power comes to nothing. However much strength there may be, however much virtue, however much power, what is the use? What became of a man as great as Karṇa in the end? He had all the power he needed. He was born of the sun's boon. He wore the armour of the sun too.