What keeps you grounded?

In soccer you must have both feet on ground when you throw the ball back into play. i know there is a name for this but I don’t know it. 

What is it that keeps you grounded?
My role as a mother grounds me. Life stops when one of children need me or are sick in bed. If they are unhappy, I try to connect with them and find out how I can help. 

What grounds you?