Edward Hallowell (psychiatrist) Quote

To create worry humans elongate fear with anticipation and memory, expand it in imagination and fuel it with emotion. The uniquely human mental process called worrying depends upon having a brain that can reason, remember, reflect, feel, and imagine. Only humans have a brain big enough to do this simultaneously and do it well.

Worry: Controlling it and Using it Wisely (ed. Pantheon, 1997) - ISBN: 9780679442370