The Emersonian Travel Passage in Seneca

In a previous complaint about the travails of travel, I quoted a line from Emerson's "Self-Reliance": "Our first journeys discover to us the indifference of places." I claimed that the thought was Seneca's before it was Emerson's. In the meantime the passage has been located in my hardcopy of the Loeb Classical Library, no. 75 (Seneca IV, Epistle XXVIII ad Lucilium, trans. R. M. Gummere, p. 199):

     Though you may cross vast spaces of sea, and though, as our Vergil
     (Aeneid, iii. 72) remarks, "Lands and cities are left astern, your
     faults will follow you whithersoever you travel." Socrates made the
     same remark to one who complained; he said: "Why do you wonder that
     globe-trotting does not help you, seeing that you always take
     yourself with you? The reason that set you wandering is ever at
     your heels."

     Licet vastum traieceris mare, licet, ut ait Vergilius noster,
     "Terraeque urbesque recedant, sequentur te, quocumque perveneris,
     vitia." Hoc videm quaerenti cuidam Socrates ait: "Quid miraris
     nihil tibi peregrinationes prodesse, cum te circumferas? Premit te
     eadem causa, quae expulit."