“Sales and Theater have much in common. Both take guts. Salespeople pick up the phone and call strangers; actors walk onto the stage in front of them. Both invite rejection—for salespeople, slammed doors, ignored calls, and a pile of NOs; for actors, a failed audition, an unresponsive audience, a scathing review. And both have evolved along comparable trajectories.” 

Adopted from Daniel Pink’s book To Sell is Human