A doctor can influence the world making a difference on it. Here are some tips that can help you to think better of it:
Treating people with love and respect, listening to them carefully in order to help them;
Treat the person's holistic way, not just the disease;
Seeking new methods and techniques to better serve patients;
Do volunteer work, serving underprivileged people in neighborhoods and disadvantaged communities;
Love what you do, believing in the work as an opportunity to do the good and bring hope to people through the quality of life and health;
Be different, making the difference. Be the change you wish to the world.
Have a successful career!