Who do you mean by "we"?

Because your definition of the mind is most certainly not even very common.

Mind isn't just a capacity, and even less one for ONLY rational thought.

The mind is full of irrationality, this is impossible to deny.

I'd argue that a mind guided by the soul becomes ethical and rational. But that most certainly isn't it's only state, nor the most common one.

Anyway, I was hoping you were aware of scripture on the dangers of the mind, but I take it you aren't, or you probably would have answered my question.