hMm.. i bet you have seen an ambulance speed past you right? well, i would like to put forward this hypothesis: which segment of the ambulance that first comes to your mind reflects upon your character
An ambulance speeds past. Do you think of
A) The driver
B) The nurse/medical orderly that are working on the patient
C) The patient
If You think of A) The Driver, you're probably someone that likes speed and danger. you might also crave for attention. You could be an attention-seeker but there would be times when the needs of other people serve as fuel for your acceleration. You would probably be at the head of every race or competition. you would have determination and perseverance but this might be short-lived. only you know.
If You think of B) The nurse/ medical orderly that's working on the patient, you like to help others. You would probably have the biggest contribution to society in your life. You have a huge heart and would help others no matter the cost. With all possibility, the happiness of others around you affects your happiness. You live for your friends. You might be an efficient, productive but quiet worker in the group. Without you, the group will die. Yet the spotlight rarely shines on you. You help others regardless of whether you have been through or you know what they are going through.
If You think of C) The Patient, you've suffered! And you don't want others to suffer like you do. You would use your life-changing experiences to help others along the same path or turn them from the path that you once trod. The experiences serves as your fuel. Yet, you would possibly not help those who suffer what you have not been through. However kind you are, you would not help others physically that much. you would probably be the type that calls a hotline to donate money instead of those that volunteers their time and services.
Note: This is just my reflective hypothesis. no scientific basis. high probability of inaccuracy.