yě
孔子,鲁人也
kǒngzǐ, lǔ rén yě
Confucius was a person from Lu.
非不能也,是不为也。
fēi bù néng yě, shì bù wéi yě.
It's not that one cannot do it, but that one chooses not to do it.
何也?
hé yě?
Why is that? / What is the reason?