A will is something more than an ability to talk and understand.
It's close to the ability to think for themselves and others.
Having a will is something like having artificial intelligence that can think about things as well as possess human-like emotions.
Our emotions can be very good, bad, positive, and evil.
Just like them, something possessing a will can be either good or evil.
But, mostly, something with their own will within the world is good.
To define 'good', we can say that they can use the power they possess to help others or rule over others.
They can either improve everything within nature or just stay in a place created by themselves.
Possessing a will was the same as being a higher life form that can think far better than normal humans about some particular things.
There were some very famous 'things' possessing wills that were famous in many books.