子曰，父在，观其志，父没，观其行，三年无改于父之道，可谓孝矣。
Modern Chinese Guide
孔子说：父亲在世时，观察儿子的志向；父亲去世后，观察儿子的行为。如果多年不改变父亲合乎正道的做法，就可以说是孝了。
James Legge Translation
The Master said, "While a man's father is alive, look at the bent of his will; when his father is dead, look at his conduct. If for three years he does not alter from the way of his father, he may be called filial."
Source: James Legge, public domain, 1893.
Notes
- 底本：Wikisource 整理的 James Legge《The Chinese Classics》公版中英文本（1893–1895）。
- 简体化：原文由繁体转为简体（OpenCC），与公版英译逐句对应。
- 白话参考底本：《白话论语读本》，张兆瑢、沈元起编译，上海广益书局1948 年新三版。