The major contents of the Aranyakas are theosophy (Brahmavidya), meditation (Upasana) and knowledge of breath (Pranavidya). It describe the secret meaning of the sacrifice and the concept of Brahma as well. The creation of the universe, the power of the Almighty, Om, the soul and the cycle of birth and death are explained in Brihadaranyaka in a simple manner. No nation, no country, no culture in this age of science has been able to produce such great truths related to the knowledge of the Self and the Almighty as are mentioned in this Aranyaka. In this reference dialogue between Maitreyi and Yajnavalkya is often quoted.