I think it's worth noting that there are some things an arahant can't do, such as acting out of ill will toward another. The reason is that getting to the state of arahantship involves extinguishing certain elements of personality that are common to every ordinary (worlding) human being on the planet. Once those bits and pieces are gone, they are truly cut off and gone. That's my understanding of the teaching, any way. So an arahant can't act out of ignorance, or out of ill will, or out of greed, for example. The arahant no longer has the capacity for these things.
What does that have to do with crying? Maybe not a whole lot. Sure, the tear ducts will still function, and if a fly lands in an arahant's eye, there's no reason to think that a normal bodily function would not occur (at least I don't think there's any reason). But I don't think that's what we're talking about.
This discussion seems to have to do with how we perceive ourselves when we cry. I don't think it matters what an arahant would or would not do. But I think it's worth considering how we react to ourselves when we cry, and how we react to others when they cry. Does that reaction stem from ignorance, or from wisdom?


