The holy city described in Revelation chapter 21 and the tree of life described in Revelation chapter 22 are the cube and the net of cube respectively. The cube is the holiest part of Islam, and the net of a cube is the holiest part of Christianity.
In Islam, the cube is called Kaaba. And in Christianity, the net of cube is called the cross. Since the net of a cube can be folded to form the cube, Islam is the product of Christianity. And since the cube can be opened to form the net of a cube, Christianity is the product of Islam.
Islam and Christianity are two different ways of explaining the Axis Mundi. This means that the Kaaba is a cross and the Muslims in Mecca are Christians gathering around the cross. And the cross is the Kaaba and Christians are Muslims gathering round the Kaaba.
Muslims believe that the Kaaba represents the Garden of Eden. The garden is the world. And in the middle of the garden is the tree of life. The tree of life is the cross formed when the Kaaba is opened to form the net of cube (i.e the cross). The tree is the tree of life only if Christians and Muslims are reconciled. The reconciliation is the healing. The healing is made possible by the knowledge of the net of a cube.
The tree of life symbolizes non-judgment. This means that Muslims and Christians can access this tree only if they advance from emphasizing on doctrines and religious rules to the pursuit of pure knowledge.
Purely knowledge is the pure water known as holy water. The flow of pure knowledge through teaching and learning is called the river of the water of life. The river flows from the teacher to the students.
The chord of the circle is the knowledge. The diameter of the circle is the river flowing down the middle of the city. In 2D, the cube is a square and the diameter dividing the circle into two equal halves is knowledge.
The cube is a new universe and the net of a cube is a university dedicated to the study of the new universe. Students are enrolled into the university to learn what is meant to be living in Paradise. Since Paradise is the habitation of Kings, the students are potential kings and queens. This means that every student in the university is a princess or a prince.
The new universe is Newunivars. Newunivars is a website on the internet. The website and visitors to the website constitute a network of people, such that the university is the net: the net of a cube.
The net of a cube is a tree house, and every student in this university is like a bird perching on a branch of the the tree. This means that the net of a cube is the world tree or the cosmic tree described in various cultures and religions of the world. It is the tree called Yggdrasil, Égig érő fa, giant Gaokerena, etc.
The net of a cube is the tree Jesus described in the parable of the mustard.
Newunivars was a small insignificant idea a man planted on the internet. The idea became the net of a cube, accommodating visitors (students) from all parts of the world. Newunivars is the tree of life and every visitor to the website is like a bird perching on a branch of the tree.