The Facial Feedback Hypothesis suggests that our facial expressions don’t just reflect how we feel, they can also shape what we feel. When we smile, even if only slightly, the muscles involved send signals to the brain that can boost positive emotions, just as a frown may deepen feelings of sadness or frustration. This insight reveals a powerful connection between body and mind, showing that small, intentional actions can influence our inner state. For human understanding, it underscores the inseparable link between physiology and psychology, enriching how we view emotion and behaviour. In health, it suggests simple practices, like encouraging a smile, adopting open expressions, or even gentle laughter, can reduce stress, improve mood, and support resilience. For personal wellbeing, it offers a hopeful message: by choosing our expressions, we gain a subtle yet profound tool to nurture joy, calm, and strength in our daily lives. Managing our facial expression is an aspect of self-control. Whilst anyone can improve their self-control through practice, the highest and most appropriate use of self-control is when we are filled with the Holy Spirit.