Definition.com
Sculpture is an art that owes its value to its difficulty: a fellow will hack half a year at a block of marble to make something in stone that hardly resembles a man.
Definition.com
Sculpture is the stuff you trip over when you are backing up trying to look at a painting.
Meme.com

Definition.com
Sculpture's finest stone-worker is not copper or steel tools, but the gentle touches of air and water working at their leisure with a liberal allowance of time.