The knowledge of Sanatana Dharma is essential for each and every human being since it gives answers to every question a human being has in his/her life like what is the purpose of this life?, where did we come from?, where will we go after this life?, what are the important things we should do? etc.
Sanatana dharma is the theory that our ancestors thought and clearly stated the rules and practices for our life. Sanatana Dharma is considered something common to all, transcending caste-religious divisions.