This quote conveys the idea that being on the right path or having a good start is not enough to ensure success. It's not sufficient to simply recognize the correct direction; you must also keep moving and taking active steps to make progress. Just like a train on its tracks can still be overtaken if it stops moving, individuals who become stagnant or complacent risk losing their advantage or falling behind. The quote underscores the importance of continuous effort, adaptability, and a proactive approach in achieving your goals and maintaining your position of advantage.