how do THOUGHTS become Thought-Forms?

[Ali Quadir]

have a life of their own because of some positive feedback loop.

Or negative. The majority of thought forms with enough energy to become persistent and combining are negative.

A positive feedback loop is another phrase for a vicious cycle.

I did not mean to suggest thought forms are all positive. They're all over the spectrum, positive negative and neutral.

A negative feedback loop tends to stabilize or kill itself and thus rarely leads to permanent thought forms.

Thoughts are indeed things. And we need to be aware of the effects of our choices in astral space just like we need to be aware of them in the "regular" world.