Read the diary.
Now, realize that there is profound evil in the world that effects all of us. Rarely, it manifests in dramatic ways such as this case. Its ordinary manifestations are far more banal: doubt, temptation, etc. Yet those more ordinary manifestations flow from the same praeternatural hatred and are just as dangerous, if not more so.
Yet the Lord is stronger still.
Remember that today is Friday and we recall in a special way the sacrifice of the cross that, once and for all, broke the power of death and hell forever. Live in that sacrifice today...and every day.
“Do not be afraid. I am the first and the last,the one who lives. Once I was dead, but now I am alive forever and ever. I hold the keys to death and the netherworld." (Rev. 1:17-18)