Daniel Pink explains how swapping "I can't" for "I don't" strengthens discipline. "I don't" creates a firm rule instead of a fleeting decision, and it shifts focus from behavior to identity, which makes discipline stick longer.
This is how to resist temptation. Swap I can't for I don't. The reason this works is twofold. First, when you say, I can't eat dessert, or, I can't show up late to work, you are making a decision every single time. But when you say, I don't eat dessert, or, I don't show up late to work, you're setting down a hard and fast rule that's easier to comply with. The second reason this is effective is that when you say, I can't, you're describing your behavior. But when you say, I don't, you're describing your identity, and that's powerful. When you say, I don't eat dessert, or, I don't show up late to work, you're describing who you are. And the best way to resist temptation is to activate your identity.
