Sextus Empiricus Pyrrhoniae Hypotyposes 1.14.135

[135] The Eighth Mode is that based on relativity; and by it we conclude that, since all things are relative, we shall suspend judgement as to what things are absolutely and really existent. But this point we must notice—that here as elsewhere we use the term ‟are” for the term ‟appear,” and what we virtually mean is ‟all things appear relative.” ¹ And this statement is twofold, implying, firstly, relation to the thing which judges (for the external object which is judged appears in relation to that thing), and, in a second sense, relation to the accompanying percepts, for instance the right side in relation to the left.