Think about this: You don't know when these people are going to die. They could get into a car today and be killed on the way home. Did they ever hear about Jesus? God has put you in their lives to be His ambassador. You're His megaphone, through which He wants to call out to them to come to Him and be saved.
Fear is like a megaphone in your head that pulses aggression and sadness. Hope is the audio gain adjuster. Happiness is the musical algorithm.