When we talk about self development, we think of ourselves. It is self centered development that we are trying to focus on. But there is far more than just personal development. Personal development is growing your own skills with regards to others satisfaction or self gratification.
Other individuals are primary factor to the personal development of very person. It surrounds that the person develop the important skills and attitude that will help him interact at the right manner with other people. The influence of others tells the development happening in the person's life.
For instance, a person who is waiting to be served by others is indeed satisfied by such service but personal development is not optimum. There is only self gratification but the person is not right satisfied with himself. On other hand, the servants waiting for the king's command do not have the chance to grow because their growth depends on the commands given to them which are more likely cautionary.
The environment that you live in affects your personal development. It is very important that you take note of how others make you sad or how others make you happy. Your own strengths and weaknesses can be seen with other people around. Do you usually get irritated with others or you are happy taking care of others' needs?
What is the value of others in my personal development?
The big portion of your development is the result of your interaction to the lives of others. How do you their lives? How do you see learning in their eyes? It is very important that you know the aspect of solid personal development to be able to see life at a better scale.