Chapter I
What it means
The wheel stands for the dharma Duty, law and the right order of things. For Hindus it is the moral order and one’s duties in life; for Buddhists, the teaching of the Buddha. Glossary, the teaching of the Buddha. Buddhists say that in his first sermon, at Sarnath, the Buddha “set the wheel of the dharma turning”: the truth he had found began to move through the world.
Its parts are given meanings. The eight spokes are the Noble Eightfold Path: right view, intention, speech, action, livelihood, effort, mindfulness and concentration. The hub is the discipline at the centre of practice, and the rim the concentration that holds it all together.
Chapter II
Where it comes from
In the earliest Buddhist art, from the 3rd to the 1st century BCE, the Buddha was not shown in human form. A wheel on a throne, an empty seat or footprints stood for him instead, and a wheel recalled the first sermon in particular.
The emperor Ashoka (3rd century BCE) set up stone pillars across his empire crowned with lions and wheels. His lion capital from Sarnath is now the emblem of India.
Chapter III
Where you see it today
The dharma wheel is the most widely used general symbol of Buddhism, on temples, books and flags. The 24-spoked Ashoka chakra is at the centre of the national flag of India. Golden wheels flanked by deer crown the roofs of Tibetan monasteries.