As clear as a summer's day

Origin

Before the advent of artificial lighting and climate control, human life was intimately tied to the rhythms of nature, and the clearest conditions offered were the unblemished skies of summer. On such days, with the sun high and not a cloud to obscure the view, the world revealed itself with perfect transparency: distant mountains sharp, water shimmering, and every detail crisp under the brilliant light. This simple, profound experience of absolute visual clarity became the bedrock for understanding anything without doubt or ambiguity. It wasn't just about sight; it was about an unmistakable truth, vivid and unmistakable, just like the vast, open expanse above.