The fact "The first thing you do when you act in a play is Learn your lines" is illustrated with the story:1. Jesse was the understudy in the school play.2. She practiced her lines by reading them to her brother.3. After reading through the lines 10 times she knew them well.4. If the star actor was unable to perform Jesse would know the lines.5. She would not need to look at the cue cards to say her lines in the play.