This evening I came across this passage by Arthur Henry King in Arm the Children (page 123):
I believe that the more we know about our ancestors — the way they lived, the history of their times, their language and culture — the more chance we have that they will accept the gospel. I am sure that is so because if we turn our hearts towards them, they should turn their hearts toward us. That is one of the things that Malachi means.
Strikes true to me.