We are collectively living and working in a way that rapidly depletes our ‘attention resources’. This concept is similar to “living within one’s means” or understanding and actively knowing and not choosing to push your body beyond its functional limit (I cannot run as fast as a racehorse, I have tried and it didn’t end well). So we can think of attention resources in the same light, but applied to your brain—finite and essential to everything we do. There is only so much thinking and processing our brains can do.