It's good to show someone you think they did well.
Jack goes to see his brother perform in a play and his brother comes over to him when it's over.
Jack wants to talk to his brother.
Jack expresses to his brother how good their performance in the play was.
Jack talks to his brother about sports but avoids talking about the play even though he liked his brother's performance.
Jack's brother is reassured by Jack's praise of their performance in the play.
Jack's brother thinks Jack must think they gave a poor performance in the play because he doesn't bring up the topic.