Hereditary Tradition is a thing, don't let anyone else to you otherwise - it comes down to belief. It has been a long standing idea that 'being a witch' is something that is passed down through families.
Not a lot of people believe in hereditary tradition anymore because it doesn't sound inclusive, there is also a belief which ties into this that people have more of a natural talent for magic - like naturally good at throwing a ball or understanding math - it's just part of who you are.
But, ultimately, it's down to your beliefs and beliefs have no fact tied to it besides what you experience.
|