That's true, One person can bring many change in you even if you met with such a person for s short time. I can remember I met with one person in my school life for a month and in one month I learned many things from him and It brought many positive change in myself. Unfortunately, the personality of the person changed and almost turned into opposite when I met with him after several years. But I must accept that in my early age I changed many things because of his influence.