Does the soul exist if the brain fails?

The brain has a strong influence on how we think, feel, and express what we live. But the existence of bodily limitations does not eliminate the spiritual dimension of man. Understanding the truth, choosing freely, and loving are not simply reduced to matter. We are a unity of body and soul. That is why an illness does not take away dignity or turn a person into less of a person. This question needs calm, not a slogan. Many doubts are understood better when you separate things: what faith says, what reason can see, what comes from personal experience, and what perhaps arises from a wound or a prejudice.