Understanding Krishna perfectly requires not speculation but loving devotion that naturally engages the mind always in His remembrance.Listen — Srila Prabhupada Uvaca
Bhagavad-gītā 7.1 — October 27, 1975, Nairobi 751027BG-NAIROBI [61:13 Minutes] BG-07.01_751027BG-NAIROBI Prabhupāda: śrī bhagavān uvāca mayy āsakta-manāḥ pārtha yogaṁ yuñjan mad-āśrayaḥ asaṁśayaṁ samagraṁ māṁ yathā jñāsyasi tac chṛṇu [Bg. 7.1] Kṛṣṇa, Bhagavān, the Supreme... Bhagavān means... Bhaga means opulence. Just like we use the word bhāgyavān.
From this bhāgya, "fortune," comes from the word bhaga. So personally the Supreme Bhāgyavān, or Bhagavān... Bhagavān is never unfortunate. If somebody claims that he is Bhagavān, but Bhagavān is never unfortunate.
He is always fortunate. Saṇṇām iti bhaga iṅganā [Viṣṇu Purāṇa 6.5.47]. There are six kinds of opulences. Which one possesses in full, He is called Bhagavān.
There is meaning. So we have several times explained: aiśvaryasya samagrasya vīryasya yaśasaḥ śriyaḥ [Viṣṇu Purāṇa 6.5.47]. The Supreme Personality of Godhead, because He is the proprietor of all wealth, sarva-loka-maheśvaram, He is the proprietor of all the planets, all the universes, so who can be fortunate than Him? Bhoktāraṁ yajña-tapasāṁ sarva-loka-maheśvaram [Bg. 5.29].
If you have got one lakh shillings or one ten lakh shillings, we think we have become very rich. But Kṛṣṇa says, sarva-loka-maheśvaram: "I am the proprietor of all the planets." So who can become richer than Him? Therefore He is Bhagavān. The highest rich man, the richest person, is called Bhagavān.
Nobody can claim that he is the richest. That is not possible. So one who claims that "I am the richest. Nobody is equal to Me, and nobody is greater than Me," He is Bhagavān.
Mattaḥ parataraṁ nānyat kiñcid asti dhanañjaya [Bg. 7.7]: "Nobody is greater than Me." That is Bhagavān. Bhagavān cannot be so cheap that anyone can claim that "I am God. I am Bhagavān." That is cheating. He must prove first of all that he is the richest of everyone.