I can understand the pure and impure! I too was attacked and assaulted I I know how dirty I felt after that event! I didn't feel clean or deserving. I can see where u get the pure part of that meaning and impure from such a traumatic event. I have often felt the same wat that I can't get clean enough from the event and don't feel like I deserve to be around people or anything good is going to happen to me going forward because of that event. I was treated poorly by people and police like I asked for it! I felt like the only way to cleanse myself was to fast and deprive myself of anything good. But I realized eventually I didn't ask for it. I still felt dirty and as you said un pure but realized it was the people who did that to me that were the ones making me feel that and there is a difference between unclean and unpure! I still may not feel deserving but I'll get to it eventually .