Ключевые слова: achievement, aim, ambition, belief, believe, black, blackboard, business, businessman, chalkboard, challenge, change, concept, confidence, creativity, determination, education, efficiency, effort, faith, happiness, health, idea, ideas, inspiration, inspirational, inspire, intelligence, message, motivating, motivation, motivational, opportunity, optimism, passion, performance, persistence, person, positive, possible, problem, satisfaction, sign, success, text, word, work, working, yes,