The concept of "pay it forward" gives us depth as individuals. It's (sort of) explained as responding to a person's kindness to oneself by being kind to someone else. So if someone somehow has helped you out, pay it forward by helping someone else out.
Beautiful video here of "pay it forward" in action. https://www.facebook.com/Upworthy/videos/969921939715331/.
Thanks for reading. Shaun