The core of inner strength lies in whether you have become the absolute decision-maker of your own life. Strong stress resistance and emotional stability are merely superficial; the true essence is whether you have absolute control over every choice you make—daring to choose, taking responsibility, and not looking back. This is a high level of autonomy. Those with weak inner strength often base their decision-making systems on others: parental expectations, societal clocks, and partner emotions can easily alter their life choices. In contrast, highly autonomous individuals have clear boundaries, are not influenced by external evaluations, can decisively withdraw from bad situations, and never look back in the face of harm. They allow external information to flow through but do not permit it to rewrite their fundamental core. Your pain and joy must come from the implementation of your own will, rather than from the feedback of others.