Ключевые слова: attitude, background, bad, business, clear, concept, conceptual, confidence, conflict, crisis, depression, drink, emotion, empty, expression, feeling, filled, fluid, full, glass, glasses, glassware, half, happiness, happy, idea, isolated, liquid, motivation, negative, nothing, optimism, optimistic, person, pessimism, pessimist, pessimistic, philosophy, positive, problem, sad, simple, stress, success, symbol, transparent, unhappy, water, white,