Personal development is about investing in yourself so that you can manage yourself effectively regardless of what life might bring your way.
Personal development allows you to be proactive. Rather than wait for good things to happen, you get out there and make them happen.
You may not always achieve your objective, but you will experience a richer and more rewarding life when you commit to pursuing your own objectives. Making that commitment to personal development is the first step on the path to personal fulfillment.