- have one's feet on the ground
- be practical or sensible
The new sales manager really has his feet on the ground.
Perhaps they didn't have their feet firm on the ground. Perhaps he was too ready to escape ... into an ambiguous world, ... a world where the conscious mind did not have things too much its own way.(L.P.Hartley)
иметь почву под ногами, иметь основание
Idioms and examples. 2014.