William James identifies the root of our power in managing internal turmoil. Stress is often less about external events and more about our internal narrative—the thoughts we repeat about those events.

We have the "ability to choose one thought over another." When a stressful thought arises (e.g., "I can't handle this"), we can consciously choose to replace it with a more empowered one (e.g., "This is a challenge I can work through"). This is not denial, but active cognitive reframing. This skill gives us ultimate control over our emotional state.

This quote is a practical tool for mental well-being. It reminds us that we are not helpless victims of our thoughts. By mastering our mindset and consciously selecting life-giving thoughts, we can disarm stress and cultivate inner peace.