Both my wife and I are running lovers. I usually run on the track in my neighbourhood. Most people walk on the track, so I am faster than them. My speed seems amazing to the walkers and I often pass by them twenty or more times around the track. This makes me feel proud.
One day, a short man came. He didn't look like much of a runner. I saw him get out of the car and warm up before running when I passed by two walkers. He started running a few metres ahead of me. He was fast but I sped up and managed to catch up with him. I had someone to compete with. But after a lap (圈), I fell behind him and had great difficulty in breathing. After two laps, my foot began to hurt, so I had to slow down and began to run at my usual speed. This time I could breathe again without sounding like I had a lung disease (肺病) and the pain in my foot went away. In a very short time, he was far ahead. He was too fast for me to follow.
That day, I learnt several lessons. In life, there will always be those slower and faster. Some have natural talent (天赋), and some have trained harder. Don't judge (判断) the capacity of a person by how he or she looks.
The point is that we each have our own speed. When we are trying to keep up, we often end up hurting ourselves and being out of breath. Slow down or speed up, but run your race to your best. Don't run fast when you should be running slowly. Don't run at all when you should be walking. Don't walk when you should be running.