Are monks expected to accept life lessons from (time spent with) the laity? In general, the monks are expected to preach the Dhamma and the laity should listen. But "behind the scenes", so to say, should monks really be learning from at least some situations they run into without the attitude they know better or that they already have the full truth?

I think I might know the answer, but I am looking for any sutta/tipitaka references or analyses. 

Also, additional/complementary mahāyāna point of views and references are  welcome.
In Ubon Ratchatani Luang Por Char talked about (translating from Isaan language) how "everything is teaching us."

Also, working with people was developing strength in him, he said.