Single cells disease causes personality changes

If all virtues and qualities are in the control of an immortal soul, how can a mere single cell infection of the brain cause changes in personality?

Or alternatively, how many BKs in India are "fighting Maya" with meditation that might just actually require medical screening and a simple treatment.

Who questions such things rather than struggle to apply a one-fix-cure-all?

Parasitic Protozoa Infection (Toxoplasmosis)

Between 50 to 80% percent of the world’s population has, or has had, toxoplasmosis. Toxoplasmosis is an infection of the brain by a parasitical single cell protozoa. In areas of high population, and low sanitation, the disease may affect up to 80% of humans.

When symptoms of toxoplasmosis occur, the afflicted person may suffer paranoia and altered mental states, delusions and hallucinations, schizophrenia, and behavioral problems.

Toxoplasmosis also has psychological effects on its victims. In a study at Charles University, men affected with toxoplasmosis were more prone to jealousy and suspicion. Infected women, on the other hand, were more warm-hearted and outgoing are were more likely to have schizophrenic children. Psychologically, both sexes showed more self-criticism than did the uninfected control group.

Many humans with brain parasites are not aware of the infection, and don’t seek treatment.

Effects of Toxoplasma on Human Behavior by Jaroslav Flegr

Putting aside actually mental illnesses and borderline personality disorders, toxoplasma is not the only such condition.

If all virtues and qualities are in the control of the immortal soul ...

I think different qualities of the mind and personality use different parts of the brain. The hardware and the software analogy is quite a good one. The article is very interesting though and shows the questioning of science in a very positive light.