It's kind to do things for a stranger.
Brian is walking through a section of town where the homeless congregate.
Brian wants to help someone.
Brian sees a man sitting on bench looking skinny, so he goes into a nearby fast food place and buys him a big sack of sub sandwiches.
Brian tells a man begging on the sidewalk to cheer up, things will get better one day.
The man has a good meal and is able to help some of his other homeless friends have a good meal.
The man goes hungry that night because Brian didn't give him any money.