Upright
A throne on a rough sea, and he isn't even wet. The King is feeling that has been made trustworthy: the person who stays kind and clear in a situation that would knock most of us sideways.
Reversed
Reversed, calm is doing the work of suppression. Nothing is felt out loud, and it all leaks out sideways a fortnight later.
If this is your card this month
Where are you being composed instead of honest?
A card is a prompt rather than a forecast. It doesn't know what will happen, and the useful part is what you do with the question it hands you. We make that case at more length in not a prediction, a mirror.