Synchronized

I have a friend who learned to fly in a twin engined airplane. He said the biggest issue to overcome was getting the engines synchronized properly. If one engine overpowered the plane would veer off and vibrate a lot, it took a lot of training and adjustment to get it right. He said in the beginning when that vibration came in he would find it frustrating as to which engine to retard or advance but when it was right it flew perfect. Training and experience brought ease to this and it became almost second nature.
That feeling of rightness, of being perfectly synchronized is why God insists on christians marrying other christians. He wants spouses to be finely adjusted to one another, equally tuned to the leading of the Spirit and even going beyond just a shared belief to the intensity of their belief. This indeed is true synchronization and the compatibility will become second nature as a couple find their fulfilment in God.