The Buddha's first sermon following his enlightenment is known as, "The Discourse on Setting in Motion the Wheel of the Law." A long-established symbol of Buddhism, this wheel is usually shown with spokes; each of which represents a part of the Noble Eightfold Path. As the wheel is circular, and so has no beginning or end, it is seen to possess the same eternal properties as Buddha's teachings.
The Buddha's Noble Eigthfold Path:
Right Understanding. Right Intention. Right Speech. Right Conduct. Right Occupation. Right Effort. Right Mindfullness. Right Concentration.