I like it:
In a world of mediocrity, dedicate your attention and become a train that paces to success and achievement.
You have raised two truths in this post:
We are too distracted to do many things at once without focusing on what is really important and productive for us.
Do many activities at once does not allow us to have quality results, it makes us mediocre.
Living without focusing on doing what we do best is wasting our time of life. Maybe, we live with a lot of fun, but we could finish our last year with a lot of frustration.
Best regards