There are 100 billion neurons in the human brain making and re-making connections.

 Helping us with math. Remembering our keys, our dad's voice. Working hard all the time. 

The trouble with crossed wires is you don't know they happened until it's too late. 

So we have to be very careful with our connections. They take time, care, and attention. They take vigilance and single-mindedness. We reconnect everything we can as carefully as we can.

 And then we just have to pray to God that we got it right.