The Upanishads are a book of discoveries – most of it about human personality, its structure and uniqueness, and also about the ultimate nature of Godhead and the universe we live in.
Upanishads are a mine of knowledge. But like many other important things in life, we tend to overlook them. One of the reasons for this is their language. There is always a need to restate and rephrase the eternal truths of Upanishads. Great spirituals giants like Jagadguru Shankaracharya have tried to draw the attention of the people to the eternal relevance of the message of Upanishads. They had to restate the message in a language which the people could understand. In modern times also Swami Vivekananda etc., have done the same. Even Swami ji has said he never quoted anything except Upanishads. It meant everything in this material universe is existed in Upanishads. As the old saying goes ” Everything exists is in the Upanishads and nothing exists out of Upanishads.”
Upanishads are the very basis of Indian Culture and spiritual heritage. No one can ever understand or appreciate the essence of Indian culture without making a study of the Upanishads. They are like the forefathers of the Indian culture and civilisation. All Hindu beliefs, rituals and festivals, all systems of orthodox philosophical systems in India and also the lives and teachings of all the mystics and saints India has seen over the centuries are rooted in the mystic realisations of Upanishads rishis.
Strength and fearlessness is what the Upanishads preach. Strength comes from that which is enduring. And fearlessness comes from knowing our indestructible and immortal nature. When Janaka, the celebrated king mentioned in the Upanishads, ‘realised’ the truth of atman, it was said that he became fearless.
Source: Vedanta Kesari