What does the man mean?

W: I don’t think the job has to be done perfectly.
M: Maybe, but it’s important to do your best.
W: Yes, maybe you are right.
M: Just do your best.

W: It’s really a big problem to teach our children how to behave. When I get angry, I say things I don’t mean.
M: If you want your kids to be polite, you’ll have to be polite to them.
W: Probably you are right.
M: Just make a try.