In the next sutra the author reveals that the Supreme Lord does not increase when He creates the universe. Neither does He become less when He destroys the universe.
Sutra 9
Because He is perfect and complete, His nature is always unchanged.
Commentary by Srila Bhaktivinoda Thakura
In the Isa Upanisad it is said:
"The Personality of Godhead is perfect and complete."
Here someone may ask: If the Supreme Personality of Godhead is perfect and complete, then what motivates Him to create the material world?
In the next sutra the author answers this question.
Sutra 10
Compassion is the motive of His actions. He has no other motive, for His every desire is at once fulfilled without any effort on His part.
Commentary by Srila Bhaktivinoda Thakura
Compassion is the motive of the Supreme Lord's actions. He has no other motive, for His every desire is at once fulfilled without any effect on His part. However, the conditioned souls act in a different way. They are busily engaged in various activities to attain their desires.
In the Sruti-sastra it is said:
"The conditioned souls act to fulfil their material desires."
"The Supreme Personality of Godhead has no need to act to fulfil His desires, for His every wish is at once fulfilled without His having to act."
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“Who am I?” Maybe you’ve never even asked yourself this question. You might think you already know who you are. Unfortunately, however, it’s likely that you don’t know who you are at all. And if you don’t know your real identity, you’re in trouble. You’ll spend your life in a kind of dream state—you’ll falsely identify yourself as something or someone you aren’t. Then, on the basis of this false identification, you’ll determine the goals of your life and the purpose of your existence. You use these goals to gauge whether you are making “progress” in life, whether you are a “success.” And you are aided and abetted in this delusion by a complex network of relationships with other dreamers. Of course, at death (and sometimes before), the whole thing turns into a nightmare.
So knowing who you are is a very practical necessity. The question “Who am I?” is not a philosophical football meant to be kicked around coffeehouses by pseudo-intellectuals. It’s a real-life question. Nothing is more important and more relevant than to know who you are.
Science of Identity Foundation - Siddhaswarupananda
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In the Smrti-sastra it is said:
"There is not anything that the Supreme Personality of Godhead does not attain merely by wishing for it.
In Srimad Bhagavatam (3.7.2-3), Vidura asks the following question:
"O great brahmana, since the Supreme Personality of Godhead is the complete spiritual whole and is unchangeable, how is He connected with the material modes of nature and their activities? If this is His pastime, how do the activities of the unchangeable take place and exhibit qualities without the modes of nature?"
"Boys are enthusiastic to play with other boys or with various diversions because they are encouraged by desire. But there is no possibility of such desire for the Lord because He is self-satisfied and detached from everything at all times.
Sri Maitreya Muni answered in these words (Srimad Bhagavatam 3.7.9):
"Certain conditioned souls put forward the theory that the Supreme Brahman, or the Supreme Personality of Godhead, is overcome by illusion, or maya, and at the same time they maintain that He is unconditioned. This is against all logic."
The following commentary is given for this verse:
This verse means, "the idea that the Supreme Personality of Godhead, who is the master of inconceivable transcendental potencies and the supreme controller of all, can become bewildered by the illusory potency maya is an idea that is against all logic."
In Srimad Bhagavatam (2.3.36) it is also said:
"The Lord, whose activities are always spotless, is the master of the six senses and is fully omnipotent with six opulences. He creates the manifested universes, maintains them, and annihilates them without being in the least affected. He is within every living being and is always independent."
"The Supreme Personality of Godhead is bliss. From His bliss all living entities are born. Because of His bliss they remain alive. Departing this world, they attain Him, the supreme bliss."