人は行動している限り確実に成長しているけど、成果のスピードは人それぞれ。
大切なことはスピードじゃなく、習得するまでやめずに継続すること。

Speed of Results
As long as you are taking action, you are definitely growing, but the speed of your results will vary from person to person. What is important is not the speed, but to continue until you have mastered it.