believe one's own eyes, one cannot

believe one's own eyes, one cannot

One finds it hard to trust one’s own perception or senses. This expression of incredulity dates at least from the seventeenth century, and has been a cliché since the late nineteenth century. “Believe it tho’ I saw it myself, I cannot” appeared in Bartholomew Robinson’s Latin and English Adages (1621).
See also: believe, cannot, one, own