There are two ways to focus on the self. 1. You can focus on your problems. 2. You can focus on you growth and self development.
By focusing on your problems, you deny yourself the ability to truly reach out and do something for others, another words, being selfish as opposed to selfless. By focusing on your self development, you have the power and the ability to share that with others as you go along, ergo, you can contribute to their self growth also.
The paradox is, the more focussed on your self growth you are, the more selfless you become. The reason for this is the way to truly grow, is to help others grow too.