Mine I took from Edgar Allan Poe's short story, The Assignation.
"There are surely other worlds than this-- other thoughts than the thoughts of the multitude-- other speculations than the speculations of the sophist. Who then shall call thy conduct into question? who blame thee for thy visionary hours, or denounce those occupations as the wasting away of life, which were but the overflowings of thine everlasting energies?"
The word "sophist" isn't held in very high regard in this quote, but I loved it all the same. I use it to mean "thinker" from it's root meaning knowledge, thought, or wisdom. But it also means, at least around Poe's time, someone who uses false arguments convincingly. And I suppose that's also accurate for me at times as well. Or at least the false arguments part. I don't know about convincingly. Nor purposefully.