The world is not impermanent if one lives there after knowing God.
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 realise God, see Him by means of spiritual discipline. If He imparts power you can do good to others; otherwise not.
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.
It is very pleasant to scratch an itching ring-worm, but the sensation one gets afterwards is very painful and intolerable. In the same way the pleasures of this world are very attractive in the beginning, but their consequences are terrible to contemplate and hard to endure.
To work without attachment is to work without the expectation of reward or fear of any punishment in this world or the next. Work so done is a means to the end, and God is the end.
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'.
When the head of a goat is severed from its body, the trunk struggles for some time, still showing signs of life. Similarly, though ahamkara (egotism) is slain in the perfect man, yet enough of its vitality is left to make him carry on the functions of physical life; but it is not sufficient to bind him again into the world.
If you must be mad, be it not for the things of the world. Be mad with the love of God.
Live in the world like a waterfowl. The water clings to the bird, but the bird shakes it off. Live in the world like a mudfish. The fish lives in the mud, but its skin is always bright and shiny.
The sun can give heat and light to the whole world, but he cannot do so when the clouds shut out his rays. Similarly as long as egotism veils the heart, God cannot shine upon it.
The world is indeed a mixture of truth and make-believe. Discard the make-believe and take the truth.
The world is impermanent. [All things change. Knowing this helps you see the end of any difficulty and thereby have hope.]
Little children play with dolls in the outer room just as they like, without any care of fear or restraint; but as soon as their mother comes in, they throw aside their dolls and run to her crying, "Mamma, mamma." You too, are now playing in this material world, infatuated with the dolls of wealth, honour, fame, etc., If however, you once see your Divine Mother, you will not afterwards find pleasure in all these. Throwing them all aside, you will run to her.
God has created the world in play, as it were.
If there are errors in other religions, that is none of our business. God, to whom the world belongs, takes care of that.
It is not lust alone that one should be afraid of in the life of the world. There is also anger. Anger arises when obstacles are placed in the way of desire.
The world is impermanent. One should constantly remember death.
A boat may stay in water, but water should not stay in boat. A spiritual aspirant may live in the world, but the world should not live within him.
The fabled musk deer searches the world over for the source of the scent which comes from itself.
These people are like ... a frog living in a well, who has never seen the outside world. He knows only his well, so he will not believe that there is such a thing as the world. Likewise, people talk so much about the world because they have not known the joy of God.
Why does God allow evil in the world? To thicken the plot.