I have been mortal, and some part of me is mortal yet. I am full of tears and hunger and the fear of death, though I cannot weep, and I want nothing, and I cannot die. I am not like the others now, for no unicorn was ever born who could regret...
Madness string 21915
The reason why you feel fear is because it's not familiar. The unknown is scary, and some of the consequences are harsh. You can feel awful. You can feel all sorts of things, and still do the right thing. An act of character, you feel all those emotions, and there's a part of you that is unflappable. Absolutely committed. And the first time you feel it, it's great.