Dhammapada 

The Dhammapada is a collection of aphorisms that illustrate the moral teachings of Buddha — the spiritual path to the supreme Truth. Probably compiled in the third century BCE, the verses are arranged according to theme, covering ideas such as self-possession, good and evil, watchfulness and endurance. Together they describe how an individual can attain the enlightenment of Nirvana, the supreme goal of Buddhism. The road to Nirvana, as illustrated in The Dhammapada, is narrow and difficult to negotiate, but the reward of eternal life gives hope and determination to the traveller.