Parable of the Two Villages
I don't know the origin of this parable but it's a profound example of how our world views can warp our perception of reality
A man who was traveling came upon a farmer working in his field and asked him what the people in the next village were like. The farmer asked, "What were the people like in the last village you visited?" The man responded, "They were rude, unfriendly, dishonest people." "You'll find the people in the next village are the same," said the farmer.
Another man who was traveling to the same village came up to the same farmer somewhat later and asked him what the people in the next village were like. Again, the farmer asked, "What were the people like in the last village you visited?" The second man responded, "They were kind, friendly, generous, great people." "You'll find the people in the next village are the same," said the farmer.