the false man sees false shows, plausibilities, expediences: the true man is needed to discern even practical truth.
 Thomas Carlyle, On Heroes, Hero-Worship, and The Heroic in History (1841). copy citation

Context

“In fact, everywhere we have to note the decisive practical eye of this man; how he drives towards the practical and practicable; has a genuine insight into what is fact. Such an intellect, I maintain, does not belong to a false man: the false man sees false shows, plausibilities, expediences: the true man is needed to discern even practical truth. Cromwell's advice about the Parliament's Army, early in the contest, How they were to dismiss their city-tapsters, flimsy riotous persons, and choose substantial yeomen, whose heart was in the work, to be soldiers for them:” source