【答案解析】Success, big or small, depends on some factors, including effort, opportunity and inspiration. People achieve success in different ways (the way success is achieved is different). Businessmen (merchants) can never make profit without seizing the opportunity (can make profit only by seizing...); an athlete can't become a champion (win the championship) without chronic (long) and scientific training. Likewise (similarly), it is difficult for artists to make any breakthroughs without (in the absence of) inspiration / when no inspiration strikes them. In a word, chance favors the mind which is prepared.