Darkness can trigger irrational fears: what if an animal, a burglar, or a murderer should suddenly appear? But it can also give rise to a rational fear: when you cannot see anything, there is always the risk of bumping into an obstacle, of falling ...
Darkness can cause irrational fear – a wolf, a burglar, a murderer might suddenly appear! But it can also be the cause of a rational fear – when you can't see anything, you always run the danger of bumping into something, of falling and hurting ...