There is no question which is not answered in the Vedas. The Vedas contain the solutions to all the problems of man. For example, you can identify the day and date of referring to the almanac prepared by an expert. Similarly, the Vedas provide knowledge of prakriti, Paramatma and Jivatma. Only on delving deep into the Vedic teachings can one comprehend such profound truths.
(From : Sai Veda, The Word of God, sayings of Bhagavan Sri Sathya Sai Baba)