āYou have your feet on the groundā is a common phrase. It means:
If you say that someone has their feet on the ground, you approve of the fact that they have a sensible and practical attitude towards life, and do not have unrealistic ideas.
I think the person who told me āYou have your feet on the ground by not having your feet on the groundā meant I have enough imagination not to get stuck with limits that others place on me. That Iām not overly practical. I have some dreams that may be far out there, but if you donāt have dreams, you have no chance at achieving the dreams.