"The best recreation is to do good" 

What this quote is saying plain and simple you doing good is the best recreation you can have. Recreation is when you do something for enjoyment and not for work, you're doing something for yourself and the best way to make yourself feel good is by doing good. In order to be happy and to feel good you must do good because you will never feel good if you do the wrong thing. If you don't know what to do with your free time then why not go do good.