How can I accept losing control of my mind and will?

After some reflection, I've noticed many of my mental hangups / dispositions (sankhara) were formed due to a deep seated fear of losing control over my mind / volition. Examples that come to mind include: - Being deceived into doing something against my principles - Being coerced into doing something unethical - Performing negative actions caused by a mental illness (Alzheimer, ...) - Having my ideas changed through to physical torture How can I overcome this fear? ---------- My understanding of the Dharma is limited, so I would appreciate help understanding the situation from that perspective. Is this fear caused by attachment to mental dispositions? Is this a fetter? In particular, is it caused or conditioned by belief in self? Are dispositions part of self? I understand that theoretically mental dispositions should be impermanent? But in practice some dispositions are very hard or impossible to change. Does it make sense to focus on changing unhelpful dispositions? Would it make more sense to keep analysing the causal link of the dispositions, practising more meditation to notice the fear when it arises, or practising acceptance of the current situation?