Science proved it. When you’re faced with a challenging task, people who sat up straight and crossed their arms stayed with it for nearly twice as long as those who didn’t assume such a determined stance. When you change body postures, breathing patterns, muscle tension, facial expressions, gestures, movements, words and even vocal tones, there’s a surge of chemicals that change our internal state. The same thing happens when you smile. Smiling can trick your mind into feeling happy, simply by moving your facial muscles. Smiling activates a positive series of reactions in the brain. When your muscles say you’re happy, you’re more likely to have positive experiences with others. Facial expressions contribute to how you feel, they don’t cause feelings. So, control the controllable and “assume the position” of happiness or confidence when you’re faced with difficult situations.