Mencius - Book 7, Part 2, Chapter 26

Mencius said, 'Those who are fleeing from the errors of Mo naturally turn to Yang, and those who are fleeing from the errors of Yang naturally turn to orthodoxy. When they so turn, they should at once and simply be received.

'Those who nowadays dispute with the followers of Yang and Mo do so as if they were pursuing a stray pig, the leg of which, after they have got it to enter the pen, they proceed to tie.'

~ James Legge translation via nothingistic.org ~

 Go here to read the introductory post to this serialized version of the Works of Mencius.