Though I walk through the valley of death...

My sister has been going through some things.Things I do not understand. This makes some of her actions seem odd - if not strange.
I am powerless to address anything since I know very little. I do know that our dad loves and cares for her and wishes her only the best. She, I'm afraid does not believe this. What can I say or do?!

I pray that she will be able to open up to someone trustworthy and that she can be bold enough to deal with whatever surfaces so as to come through victorious and free.