Direct experience: All systems of Indian philosophy claim to be derived from the Veda but the Veda itself are a record of the sages who realized the truth within. To solve life’s questions related to nature of life, death, birth, cosmic/ individual existence, they started making rational inquiries, observations. Unable to find satisfactory answers, they discovered various methods of meditation that help one attain the higher levels of consciousness in which one may have direct experience of the truth. Each school originated with an enlightened teacher who described his experiences of the truth and method of attaining it.