Faith is a belief that does not rest on logical proof or material evidence.
We place a value on human life and express it via the law. We also acknowledge that there are actions that can require the payment of a life and express that via the law as well.
You didn't forget. You just exposed a conflict within your philosophy that you probably didn't even know was there until you saw it in black and white. I commend you for recognizing it and not deleting it.
In matters of killing, the law is all we have. As things stand today, abortion is as unconstitutional as slavery was. Blacks were enslaved because a court said that they were not human beings and unborns may be killed for the very same reason.
Refer to the definition of faith. You reqire something beyond logic and whatever you care to call it, it is faith.