I appreciate all the posts, and will appreciate others, if they come. As of this moment, I can conclude that a couple of forty-something witness parents might approve her daughter marrying a much older man for many reasons, but let's give the spiritual ones.
"This life, here and now, isn't important, really. Practical matters, such as bringing food to your table, are important for the time being only. Marriage is forever and ever. So, what we need is to cover the short term and the infinitely long term. For the short term, it's enough if he is spiritual and has the means to bring food to the table. That doesn't mean we want brother Oddball, but an older brother is way better than, Jehovah forbid, a wordlly man. Now, for the infinitely long term, brother 40-something will become young again in the new system, so age differences won't really matter".
I won't question the religious aspects of this. I just would like to mention what so many of you already know: that this marriage isn't about love, and that this way of arranging things results in enormous pain and many unhappy marriages. If I were a witness parent, my infinitely long term thinking would make me not approve of an older brother, unless he proved to be a very, very, very, very, very good and compatible person. I would give a damn about his being theocratic, sorry; I would take that for granted since he would be a witness.
And I tend to think that I would actually prefer my sister marrying a loving worldly man over an unloving brother. The worldly man would get to die soon and my daughter would get to have some happiness for the time being. An unloving brother, forever and ever.... NO WAY.
Thanks to all, and I look forward to more posts.