Vedanta does not present mundane religion.......but mundane religion is mostly fabricated and there are many on offer.
Instead Vedanta presents Santana Dharma which is not the same as mundane religion..
Santana-dharma does not refer to any sectarian process of religion. It is the eternal function of the eternal living entities in relationship with the eternal Supreme Lord. Sanatana-dharama referrs to the eternal occupation of the living entity.
The English word "religion" is a different from sanatana-dharma. Religion conveys the idea of faith, and faith may change. One may have faith in a particular process, and he may change this faith and adopt another, but sanatana-dharma referrs to that activity which cannot be changed.
For instance liquidity can not be taken from water, nor can heat be taken from fire. Similarly the eternal function of the eternal living entity cannot be taken from the living entity. Sanatana-dharma is eternally integral with the living entity. When we speak of sanatana-dharma, then, we must take it forgranted that it has no beginning or end.
That which has neither beginning or end cannot be sectarian, for it cannot be limited by any boundaries. Yet those belonging to some sectarian faith will wrongly consider that sanatana-dharma is also sectarian, but if we go deeply into the matter and consider it in the light of modern science, it is possible for us to see that sanatana-dharma is the business of all people of the world--nay, of all the living entities of the universe.
Non-sanatana religious faith may have some beginning in the annals of human history, but there is no beginning to the history of sanatana-dharma because it remains eternally with the living entities.
The Bhagavad-gita states that the living entity has neither birth nor death, he is eternal and indestructable, and he continues to live after the destruction of his temporary material body.
In reference to the concept of sanatana-dharma, we must try to understand the concept of religion from the Sanskrit root meaning of the word. Dharma referrs to that which is constantly existing with the particular object. We conclude that there is heat and light along with the fire; without heat and light there is no meaning to the word fire. Similarly, we must discover the essential part of the living being, that part which is his constant companion. That constant companian is his eternal quality, and that eternal quality is his eternal religion.
When Sanatana Gosvami asked Sri Caitanya Mahaprabhu about the constitutional position of the living being He replied that it is the rendering of service to the Supreme Personality of Godhead. If we look at what is happening around us in the world we can easily see every living being is constantly engaged in rendering service to another living being. We can see that one friend serves another friend, the mother serves the son, the wife serves the husband, the husband serves the wife and so on. If we go on searching in this spirit, it will be seen that there is no exception in the society of living beings to the activity of service.
The politician presents his manifesto for the public to convince them of his capacity for service. The voters therefore give the politician their valuable votes, thinking that he will render valuable service to society. The shopkeeper serves the customer, and the artisan serves the capitalist.
The capitalist serves the family, and the family serves the state. In this way we can see that no living being is exempt from rendering service to other living beings, and therefore we can safely conclude that service is the constant companion of the living being and that the rendering of service is the eternal religion of the living being.
Yet man professes to belong to a particular type of faith with reference to particular time and circumstance and thus claims to be a Hindu, Muslim, Christian, Buddhist or any other sect. Such designations are non-sanatana-dharma. A Hindu may change his faith to become a Muslim, or a Muslim may change his faith to become a Hindu, or a Christian may change his faith and so on.
But in all circumstances the change of religious faith does not effect the eternal occupation of rendering service to others. The Hindu, Muslim or Christian in all circumstances is servant of someone. Thus, to profess a particular type of sect is not to profess one's sanatana-dharma. The rendering of service is sanatana-dharma.
Factually we are related to the Supreme Lord in service. The Supreme Lord is the supreme enjoyer, and we living entities are His servitors. We are created for His enjoyment, and if we participate in that eternal enjoyment with the Supreme Personality of Godhead, we become happy. We cannot become happy otherwise. It is not possible to be happy independently, just as no one part of the body can be happy without cooperating with the stomach. It is not possible for the living entity to be happy without rendering transcendental loving service unto the Supreme Lord.
The sanatana-dharma of every living entity is the rendering of service. No matter what religion one professes to belong to, this eternal occupation of rendering service remains with the living entity. To perfect one's life one simply requires the redirection of this service. Instead of serving in the material world, he can serve Krishna, the Supreme Persoanlity of Godhead.
This process, transforming one's service from persons and objects in the material world, to the service of Krishna in the spiritual world, is the art of Krishna consciousness.