[WT Sharpe]

.....…and of course the clear and certain truth no man has seen
.....nor will there be anyone who knows about the gods and what I say about all things.
.....For even if, in the best case, one happened to speak just of what has been brought to pass,
.....still he himself would not know. But opinion is allotted to all.
..........— Xenophanes of Colophon (late 6th and early 5th centuries B.C.E.), Greek pre-Socratic philosopher, poet.

Here's an alternate translation of that same passage from A History of Western Philosophy (1945) by Bertrand Russell:

.....The certain truth there is no man who knows, nor shall ever be, about the gods and all the things whereof I speak. Yea, even if a man should chance to say something utterly right, still he himself knows it not—there is nowhere anything but guessing.