Afraid

We aren't afraid of the dark.
We are afraid of what's in it.
We aren't afraid of heights.
We are afraid of the possibility of falling.
We aren't afraid to try.
We are afraid of the possibility of failing.
We aren't afraid of scary movies.
We are afraid of the possibility they could be true.
We aren't afraid of death.
We are afraid of what comes after.
We aren't afraid of love.
We are afraid of the possibility of a broken heart.

To put a long story short: we are afraid of the unknown.