As you develop yourself, you become more powerful and influential you will need to correctly exercise it. The most important thing to have is a foundation of ethics, morals and values so that you will use this knowledge and power for good purposes and not abuse it.
Develop this on your own and find your moral compass here is one particular set of steps and resources to begin your journey:
Learn ethics, morals and values
Develop a personal mission statement
Resources for
Ethics:
Short resources
Ethics and Morality Psychology Today
Longer resources
Free Professional Ethics Lecture Videos by RIT Philosophy Professor
Your religion, spirituality practices
I am not including exact links here as I do not want to slant it toward my views, but you can search your own institutions and find what works for you and makes sense
Morals
(coming soon)
Values:
Personal Statement