Thinking outside the box!!

What has been your most impacting life lesson??

Ghosts???

I have heard many accounts of ghosts from personal friends and have always thought to myself "glad it wasn't me." As most of you may know, our house was built in 1880 and everything has been fine until about 6 months ago. Every night when I do a house check (let dog inside, lock doors, check on kiddos, etc.) my basement light is on 99% of the time. There are days when the basement door is not even opened up...therefore the light should not be on. The light switch is just high enough where the kids aren't intrigued by it. My only guess....must be a ghost. I really do not know what the explaination is. Do you believe in ghosts (spirits)?? If so, why and please share any personal experiences you may have.