The word darshan means the true knowledge. So the scriptures which lead to a true knowledge are called Darshan Shaashtras (philosophy). The root source of Philosophical literature/knowledge is Vedas themselves and therefore these are also called Upaanga. According to the philosophical literature, the main reason for all the miseries in life is the false knowledge. Only the true knowledge can remove the misunderstandings or false knowledge. The sole purpose of the philosophical literature is to remove the ignorance and impart proper knowledge of God Soul and nature leading to a proper understanding of these 3 entities leading to permanent peace and happiness resulting in salvation. The books of philosophy are six in number. These are 1. Nyaya, Vaisheshik, 3. Sankhya, 4. Yoga, 5. Meemaansa and 6. Vedaanta darshans. From the analytical perspective, nyaya and vaisheshik, saankhya and yoga, meemaansa and vedaanta are closely related to each other. There seems to be no difference or disagreement in the philosophical perspective of these different books of philosophy. In each book of philosophy the Vedas have been considered the final proof and authority. Vedas can be proven authentic by the Vedas themselves (vedas are self proof). All the above 6 books of philosophy are aastik darshans because they confirm to the Vedic teachings. The knowledge which has been given in the seed Forum in vedas, has been detailed and discussed in depth in a particular book of philosophy based on what the subject of that book of philosophy is. There seems to be no contradiction in the subject matter among different books of philosophy, because each book of philosophy merely deals with a different subject. This is almost saying that you’re going to a specialty store rather than a departmental store where everything is available. Swami Dayanand Saraswati in his famous book “Satyarth Prakash”, in chapter 8, makes the following statement about the Books of Philosophy. There are a total of six books of philosophy. The first one, Meemaansa, says, “nothing in this world can be produced without proper application.” The Vaisheshika says, “nothing can be done or made without the expenditure of time.” The Nyaya says, “nothing can be produced with the material cause alone.” The Yoga says, “nothing can be made without the requisite skill, knowledge, and thought.” The Sankhya says, “nothing can be made without the definite combination of atoms.” The Vedanta says, “nothing can be made without a maker.” This shows that the creation of the universe requires six different causes which have been described separately, one in each separate book of philosophy. There is no contradiction in these descriptions. The six Shastras together serve to explain the phenomena of the creation in the same way as the six men would help each other to put a thatch on the roof of the house.

There is yet another reference by respected Swami Ji in the same book, Satyarth Prakash, proving harmony between different schools of philosophy about the creation. Many different materials and personnel are needed in making a pot; these are: application, time, clay, intellect, labor and potter. In a bigger sense, the creation of the universe also needed many things. These have been described separately in different books of philosophy. The application has been described in Meemaansa, time in Vaishashik , material cause in Nyaya, divine activity in Yoga, the order of utilization of all twenty four elements needed in the creation in Sankhya darshan and the details about the efficient cause of creation, the almighty God in the Vedantic book of philosophy. It is, therefore, clear that there is no contradiction in the different philosophy books about creation. Medical sciences, including pathology, medicine, surgery, etc. all deal with different subjects, but the ultimate aim of all these fields is to heal the same human being, proving that no contradiction exists between different branches of medicine.