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Your success and happiness lies in you. Resolve to keep happy, and your joy and you shall form an invincible host against difficulties.
~ Helen Keller
It’s a weird question. All the obvious answers pop up first, tinged with sarcasm: water, food, air, breathing, the electrical stimulus that keeps your heart beating and your brain going. For some the answer might be God, or family and friends, or work, or a goal for the…