Everyone in my family is Christian, except for my sister. She is the most good-hearted, loving, forgiving, calm and sweet person I know and she really cares about everyone (whether it is me, our family, friends, patients (she is a medical student) or complete strangers) but she has never really believed in God. She is not like those passionate Atheists that will debate you and stuff, she actually never talks about it. I really care for her and I truly want her to be saved, what can I do to convert her to Christianity?