A Summary of the Srimad Bhagavatham : Ch-1. Part-7.
1: King Parikshit’s Question to Suka Maharishi : 7.
Thus, as we are ready to bestow thought on what is really good for us, that alone can be considered as ‘good’ which will be valid when we enter the different levels of creation. That which is good is a single visa that is given to us for entry into all the levels of creation. Since what is good in this world may not be good in other worlds, if we regard whatever goodness we manifest in our life in this world as the total reality, it may not carry us further to the other worlds, as they may require another qualification from us. Unless we belong to the other world in some way or the other, we cannot be received in that world. If we are citizens located only in one world, how would we enter into other worlds? That is why there is a visa system, which is the permission given by one country to an individual from another country to enter. That is to say, when we enter from one world to another, one country to another, we have to acclimatise ourselves to the laws prevailing in the new country. So is the case with the permission that is required to go to another world. We cannot go freely like that. We have been sticking only to this world, and had no idea that we belong to another world also.