I remember the day that I thought of this. I was 8 years old, on the subway with my mum. We were going to the dentist and I was afraid; The last trip to the dentist involved the nurses having to force me down onto the bed and hold me down.
I started to look around to distract myself, then I realised something: Everyone wass having their own day, their own thoughts, fears and hopes. I told mum, "Everyone here is from different places and they're all going to different places."
Since then, this thought has never left my mind.
We're in the same world, yet we're all living different lives.