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man portrait beard angry face expression human emotion male serious intense determined strong powerful masculine confident leader authority figure headshot closeup detail texture skin wrinkles lines pores hair facial hair beard mustache eyes eyebrows nose mouth lips teeth tongue expression emotion mood feeling serious intense determined strong powerful masculine confident leader authority inner strength resilience grit determination willpower fortitude toughness stamina endurance perseverance tenacity resolve purpose drive ambition motivation focus concentration determination dedication commitment perseverance tenacity resolve purpose drive ambition motivation focus concentration