In our personal lives, we often make pledges. We gladly agree to do a friend

a favor. We indicate that we would like to spend an evening with an acquaintance.

We communicate our readiness to join a business venture.

All of a sudden, circumstances change. There is no longer time for that favor.

A difficult day drained the energy that a night out demands. A more attractive

option emerges. An unforeseen crisis clamors for our attention. A financial

proposal arises from another field that dwarfs the first venture.