Yet their own lives call into question a key assumption of economic theory.

"You might say that life has called my bluff."

His life so far had called for effort, guile and careful strategy in every move he made.

All his life he's heard a bad deal called a dirty gyp.

In a dark place life may call upon the light, naming it.

Surely a good life, and a life a man of six centuries ago would have called full.

Then she went on, "But life also calls to us, and we must continue as best we can.

You know you've never in your life called me dear sister.

All his life his mother had been calling on people to see what a huge young man her son was.

And yet, in so far as one is alive, life will call.