I've seen people change many times in many ways. Only - You can't make them change. You can't be certain what will trigger the willingness to change and You can't control the manner or degree in which any person ultimately does change.
As with all matters of the heart, you'll know when you find it." Lesson to learn: The secret to accomplishing great things at work is to love what you do. Keep taking the steps that will get you closer to a career you love.