What most people mean and say, the judgements (hard or soft) they make, are based on thinking they have been taught. By people. By people who have also been taught their thinking. Also by people. On Zeitgeist.
On such a basis no man can know himself and the truth. Only when he has freed himself from what he has learned, only then is he complete and free in eternal knowledge. In his heritage as a human being, which is veiled by what he has learned.