I think every religion has a term for everlasting bliss and state of experienced spiritual ecstasy.
Nirvana means the subsiding of all human passions.
When ultimately the soul at its journey's end reaches the True Home of the Father and sees the splendour of Godhood in the ineffable resplendent light, one begins to see God in everything in the Universe. When Christ and Buddha rose above the body consciousness, they referred to the Way as leading to the Kingdom of God and the Nirvana pad respectively. The Muslims call it Muqam-i-Haq, and the Christians, New Jerusalem. Thereafter, Christ used to say: "Behold the Lord." And Guru Nanak would exclaim: "The Lord of Nanak is visible everywhere." The Sage of Dakshneshwar, Sri Rama Krishna Parmhans, when questioned by young Naren, as Swami Vivekananda was then known, whether he had seen God, replied: "Yes, my child, I have seen Him as clearly as I see you; nay, more than that."
This state baffles all description. The Muslim saints declare this condition as "Hairat, Hairat," and the Hindus, as "Aschraj, Aschraj" and the Sikhs, as "Waho, Waho", all of which are expressions of wonder. The teachings of most of the saints amongst Hindus and Muslims refer as far as Brahm. Very rarely do we find in them references to Parbrahm.
SPIRITUALITY: A Peep Inside