If Lesley's in the living room with him playing and I'm in the kitchen cooking supper, Jacob will take her hands, stand up, and "walk" her into the kitchen to be next to me.
Or, in the morning if I'm playing with him in the bedroom and Lesley is in the bathroom brushing her teeth getting ready for work, he will crawl to the bathroom door, open it, and sit on the threshhold so that he can see both of us.
Or, at night when we have Jacob in bed with us, he will get upset if he doesn't have one hand holding Lesley's and one hand holding mine. Holding just Lesley's or just mine isn't good enough. He has to be holding both before he settles down.
Jacob expresses in these moments a profound truth. For him, Lesley and I are not two separate people, but one. He becomes distressed when we give the appearance of separation or disunity.
I believe babies can see things adults forget to see. It's nice to have him around to remind me of the things that I should see.