Generate a full detail guide on the principles of Servant Leadership. The guide should be philosophical and practical. It must include detailed sections on: 1. The core philosophy of a 'Servant-First' leader. 2. The 10 key characteristics of a servant leader (e.g., listening, empathy, stewardship). 3. A self-assessment quiz for leaders to reflect on their own style. 4. Practical ways to apply servant leadership principles in daily interactions, such as 1-on-1 meetings and team projects. Please include a supportive disclaimer.