"Your level of success, will rarely exceed your level of personal development, because success is something you attract by the person you become."
Every one of us wants and desires certain things in our lives. Yours may be different than mine, but we all have our own hopes, dreams and desires and have all have our own image of what success looks like for us. This goes for all areas of our lives, including health, finances, relationships, career, spirituality,etc. If our internal mindset, our experience level, or our personal beliefs are not as best as they can be, or we are not actively striving to make them better every day, we will always struggle to reach where we want to be.
Our outer world will always be a reflection of our inside world. That's why it is so important to dedicate time every day to develop our self into someone closer to the person we want to become, to the life we want to have... to achieve the success we desire in all areas of our life.