The thing about lighting a fire is that you can expand the fire to light other fires without diminishing from the original flame. You can share something with others without taking away something from yourself. For example, a smile from a friend (or a stranger) on a bad day can really lighten your mood, and you may smile at 3 other people that day – lighting a chain reaction of smiles (and better moods!).
Group Gimmel's task for this week is to do just that: smile at people who you think might need a little help this Shabbat.