The way you are wired shapes how you practice medicine. It decides how you lead a room, how you carry a bad outcome home, and how you handle the colleague who will not return a page.

Here is the harder part, and the reason for this assessment. Your wiring does not stop with you. It shapes the people around you too. Your team. Your patients. The family that gets whatever is left of you when you walk through the door at night.

Before your next hard conversation, it helps to know:

• The temperament that drives how you lead.
• The temperament that takes over when you are stressed.
• The temperament most likely to wear you down.
• The temperament your team meets every single day.

You were made a certain way. That is not a flaw to fix. It is a design to understand. The four temperaments are an old, imperfect, surprisingly useful map of that design, named by Greek physicians long before we knew better, and still pointing at something true.

Most of us are a blend, with one dominant temperament.