feet on the ground

[feet on the ground] {n. phr.} An understanding of what can bedone; sensible ideas. Used with a possessive.

John has his feet onthe ground; he knows he cannot learn everything at once.

Teddreams of sudden riches, but Henry keeps his feet on the ground andexpects to work for his money.

Mrs. Smith was a dreamer, but herhusband was a man with his feet on the ground.