Vidyaaranya Swami: The enlightened ones are the happiest of all. He says they experience sublime joy which is always available to us but we don't see it. We will get it when we realize who or what we truly are, he adds.
Swami Sarvapriyananda teaches the Katha Upanishad, which is one of India's most revered texts and a part of the Vedas. It is a collection of philosophical poems representing a conversation between the sage Naciketas and Yama (god of death). They discuss the nature of Atman, Brahman and Moksha(liberation).