God can use logical and mundane things around us to remind us of him.
Amen to that!
Years ago when I first started homeschooling I was having a frustrating day so I decided to take the kiddos outside and find 12 stones (like in the OT river crossing story)and build ourselves a little monument. We went up to our barn hill and found all kinds of rocks, picking only the pretty ones for our pile, we carried them across the yard but by the time it came to getting the 12th rock we were tired and so I decided rather than take any more time looking for another pretty rock (how many can there be anyway!) I picked up the old ugly rock I kept passing up earlier for the prettier ones. When I got the rock to our pile and turned it over we were all surprized to see a cross cut right into it. (I put that rock on top!) Yes, it was probably cut into the rock by a tiller or some other farm implement, but what fascinating timing for someone to find that rock!