Shang prince who warned his brother 纣王 in vain and left the court; the Zhou made him ruler of 宋 to keep up the Shang sacrifices. Confucius named him among the three humane men of the Shang.
'The past cannot be put right, but the future can still be pursued' comes from the Weizi book of the Analects.
Tips
history
Named 启, he held the fief of 微, and 子 was his noble rank. Confucius's own family descended from the Song nobility. The Analects line praising him is 殷有三仁焉 'the Yin had three humane men'; the other two are 箕子 and 比干.
usage
Book 18 opens 微子去之 'Weizi left him', hence its name. The physics word 中微子 'neutrino' only shares the characters.