In terms of dreams, do humans have any insight as to what causes them? For

In terms of dreams, do humans have any insight as to what causes them? For

In terms of dreams, do humans have any insight as to what causes them? For example, if someone were to have a reoccurring dream, is there any humanly possible way of knowing why this is? Are they simply a reflection of daily life, an indicator as to what our future holds, or is it our brains way of forgetting that certain things ever happened?

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