I made the following composition. It was meant to be a formal writing.
Most proponents of euthanasia say that it is allowed only when the patient is willing to receive it. However, when the patient's mind is not stable, i.e. he does not have a determined mind, the treatment will be problematic. He might strongly wish to be put to death because of his serious illness, or he might wish otherwise depending on a circumstance. No person can determine the will of a patient who is under such a condition.
Is my use of "he" appropriate? If not, how should I write instead of "he"?
Remark This is a translation from Japanese. It is not necessarily my opinion.