Kona's best friend, Nala, is all about focus. She hits the dog park running, wrestles hard with Kona and some of her other friends but it's just a warm up. Soon she's looking for THE BALL. And it's not just any ball she wants - it has to be the specific one she has decided for whatever reason is hers for the day. She doesn't take no for an answer and god help any dog that comes between her and the chosen one. Normally the sweetest of dogs, she will attack another dog who makes the mistake of going after THE BALL. (The one exception is Kona, who can actually pull it out from Nala's mouth.)
Nala understands that to get ahead in life, you must focus on the things you want. Allowing yourself to become distracted frequently leads to failure. And you have to be prepared to sacrifice and fight for what you want.
However, there is a downside to being overly-focused and crossing the line into obsession. Nala has been disciplined and taken home early for fighting with other dogs. She sometimes misses out on great play with other dogs in her single-minded pursuit of THE BALL. She pays a price at times for her obsession.
So remember that while focus is absolutely essential in achieving success, it must be balanced with the ability to recognize and pursue unexpected opportunities. There's more than one ball in the dog park, after all.