A painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light.
— Leonardo da Vinci

Illness strikes men when they are exposed to change.
Herodotus exposed quote

A coward is much more exposed to quarrels than a man of spirit.
— Thomas Jefferson

I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it.
— Thomas Jefferson

What we observe is not nature itself, but nature exposed to our method of questioning.
— exposed quotation by Werner Heisenberg