Mencius. Book 4, Part 1, Chapter 11.
Book 4, Le Low. Part 1.
Mencius said, "The path of duty lies in what is near and men seek for it in what is remote. The work of duty lies in what is easy, and men seek for it in what is difficult. If each man would love his parents and show the due respect to his elders, the whole empire would enjoy tranquillity."
Text source: The Works of Mencius. Translated by James Legge.