the.com/ugly
Nature's way of saying the inside better be spectacular.
means Unpleasant or offensive to look at, or, by extension, morally or situationally repugnant.
from From Old Norse uggligr, meaning dreadful or fearful — rooted in ugga, to dread. So ugly originally wasn't just hard to look at; it was something to be afraid of.
Dread firstOriginally meant frightening, not merely unattractive.
Ugly ducklingAndersen's 1843 tale made plain-looking redemption immortal.
Beauty biasStudies show attractive faces are judged more trustworthy.