Truth that has been merely learned adheres to us like an artificial limb, a false tooth, a waxen nose, or at best like one made out of another's flesh; truth which is acquired by thinking for oneself is like a natural member: it alone really belongs to us. Here we touch upon the difference between the thinking man and the mere man of learning.
[tr. Dircks (1897)]

Truth that has merely been learnt adheres to us only as an artificial limb, a false tooth, a was nose does, or at most like transplanted skin; but a truth won by thinking for ourself is like a natural limb: it alone really belongs to us. This is what determines the difference between a thinker and a mere scholar.
[tr. Hollingdale (1970)]

... other hand, the truth acquired through our own thinking is like the natural limb; it alone really belongs to us. On this rests the distinction between the thinker and the mere scholar.
[tr. Payne (1974)]

But, we see that Learned men have suche art and cunning to persuade, and such filed wordes to serve their turne: that wrong doth carry the cause away, and Reason cannot prevaile.
[tr. Peterson (1576)]

Men of letters, with their parade of high-flown language, very often make the wrong to prevail and the right to succumb.
[ed. Harbottle (1897)]

We find that learned men, through their grandiose talk, very often manage to have the wrong side win and reason lose.
[tr. Eisenbichler/Bartlett (1986)]