Non-invasive brain stimulation promises innovative experimental possibilities for psychology and neuroscience as well as new therapeutic and palliative measures in medicine. Because of its good risk-benefit ratio, non-invasiveness and reversibility as well as its low effort and cost it has good chances of becoming a widespread tool in science, medicine and even in lay use. While most issues in medical and research ethics such as informed consent, safety, and potential for misuse can be handled with manageable effort, the real promise of brain stimulation does raise one prominent moral worry: it may lay the foundation of reliable, precise and stable manipulations of the mind. This article addresses this worry and concludes that it is not the possibility of manipulation, but the shift in our understanding of our mind which stands in need of careful consideration.