In the midst of my thought my eye fell on the red scar on my poor darling’s white forehead. Whilst that lasts, there can be no disbelief.
– Bram Stoker
Dracula, Chapter 23. The bright red mark on Mina’s forehead, the result of her being infected with vampirism, a reminder to Jonathan of his driving motivation to kill Dracula. He wants to end the Count’s control over Mina.