What Steven Pressfield calls resistance is the invisible force that keeps us from doing what matters most to us. Resistance feels like the temptation to check your email, to peek at social media. It feels like a temptation to quit when you should keep going. It feels like there are a thousand other things you could do. You might label it as fear, doubt, or writer's block. But it's all just resistance. Resistance is a good thing because it's a sign that you're doing something that matters to you.