This film has become a Christmas tradition in my family. We watch it every year and never tire of it. Frank Capra is a master of creating films with a message that reinforce strong values. This is probably his greatest film in that regard. Both he and Stewart have publicly stated that this is their favourite film.
The message in this film is one of courage and sacrifice for the greater good as George Bailey, a man with big ideas about seeing the world, continually forsakes his own desires to do what is right for the town. The second message is that each life important. No matter how insignificant we feel we are, we are all inextricably linked to each other and play an important part in the fabric of one another's lives.