The difference between that and pure flexibility is in their passion, experience and confidence.

FORBES: Three Keys to a Winning Attitude for a Service Business

The Iron Bowl between the University of Alabama and Auburn ignites passion in Alabama like no other event.

FORBES: Magazine Article

So it just developed - the passion in me just developed from just seeing the difference between how we used to live in Sierra Leone and how we live here in the States.

NPR: A Daughter Fights to Save Her Father's Legacy

In contrast, "Passion" is intentionally humorless, although the first duet between Giorgio and Clara definitely contains an ironic foreshadowing.

WSJ: Review: Intense revival of Sondheim's 'Passion'