The computer virus is a symbol for negative talk about other people, which Ruiz calls gossip. Negative talk about another person (say, the professor in Ruiz’s example) encourages others to see the other person negatively: it spreads and takes control of a person’s perception the way a virus takes control of a computer, altering what the user sees. This is ultimately damaging to the “user” (or the person who spreads gossip, in Ruiz’s example) because it limits their ability to use the “computer”—to use their mind in a clear, focused, and productive way.