What Brahman is cannot be described. All things in the world — the Vedas, the Puranas, the Tantras, the six systems of philosophy — have been defiled, like food that has been touched by the tongue, for they have been read or uttered by the tongue. Only one thing has not been defiled in this way, and that is Brahman. No one has ever been able to say what Brahman is.
You speak of doing good to the world. Is the world such a small thing? And who are you, pray, to do good to the world? First realize God, see Him by means of spiritual discipline. If He imparts power you can do good to others; otherwise not.
The physicians of one class feel the patients and go away, merely prescribing medicine. As they leave the room they simply ask the patient to take the medicine. They are the poorest class of physicians.
One man may read the Bhagavata by the light of a lamp, and another may commit a forgery by that very light; but the lamp is unaffected. The sun sheds its light on the wicked as well as on the virtuous.
If you desire to be pure, have firm faith, and slowly go on with your devotional practices without wasting your energy in useless scriptural discussions and arguments. Your little brain will otherwise be muddled.
God has revealed to me that only the Paramatman, whom the Vedas describe as the Pure Soul, is as immutable as Mount Sumeru, unattached, and beyond pain and pleasure. There is much confusion in this world of His maya. One can by no means say that ‘this’ will come after ‘that’ or ‘this’ will produce ‘that’.
Only two kinds of people can attain self-knowledge: those who are not encumbered at all with learning, that is to say, whose minds are not over-crowded with thoughts borrowed from others; and those who, after studying all the scriptures and sciences, have come to realise that they know nothing.