Assertiveness, powerful man swinging his arms with forward movement under soft evening light creating a warm glow around his mindful attitude of responsibility, willpower, responsibilities of power, leading with confidence on the go, movement, power of will, headstrong, walking during city, assertive, self-assertion, the ability to assert oneself, having drive, desire for action, zest for action, activity, push, pushing through struggles, prevailing, endurance, enduring, active, vigor, zeal, diligence, spirit of enterprise, enterprising spirit, entrepreneurial mind, proactive, can-do attitude, can do attitude, asserting oneself, powerful, stubborn, pig-headed, bullheaded, hardheaded, stubbornness, bullish