Three big questions to ask yourself about your purpose: "Is it big enough, Am I uniquely positioned to pull it off, Am I passionate about it?" Does your mission keep you up at night, thinking of ways to accomplish it? I'd like to add a 4th question: Can you see yourself doing this for the rest of your life? These concepts are adapted from Fred Swaniker's article in medium, found here: https://medium.com/@FredSwaniker/resist-that-calling-it-s-probably-not-your-purpose-in-life-1dd33a297185