There are other worlds, other bodies and other sources of enjoyment. Upanishad sets up a whole range of these depending upon your credit, your good karma. You get to go to one or more of these heavens and enjoy much more than you could. So it's possible that an extraordinary level of enjoyment is possible if you cultivate it enough. And clearly see they are all faith-based,. but you have to buy into this, you know, believe in this.
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).