A person who does not recognize the signs of a mental illness may not know he needs help

That's correct. Individuals who are unaware of the signs and symptoms of a mental illness may not realize that they need help. This lack of awareness can prevent them from seeking appropriate support and treatment. It is important for family members, friends, or the person themselves to look out for any changes in behavior, mood, or functioning that could indicate a mental health issue. Early intervention can significantly contribute to better outcomes and quality of life for individuals with mental illness.