《荀子·儒效》
就如工匠，他不懂得这些，并不妨碍他成为能工巧匠；君子不懂得这些，也不妨碍治理国家大事。
工匠不知，无害为巧；君子不知，无害为治。
It is like a craftsman: not knowing these things does not prevent him from becoming a skilled craftsman; a gentleman not knowing these things does not prevent him from managing state affairs.