subtile

Recent scientific discoveries have conferred upon man new powers of investigation, whereby nature has been made to reveal secrets so subtile that they never had been dreamt of before in philosophy.

From Scientific American ● Jan. 13, 2013

At Paris the Universe is seen, compos’d of Vortices of subtile Matter; but nothing like it is seen in London.

From "The Invention of Science" by David Wootton

The mental attitude of the speaker is subtile enough in itself to be fascinating, but the real suspense does not lie there.

From Shelburne Essays, Third Series by Paul Elmer More

The Märchen have a subtile flavor all their own.

From The Moral Instruction of Children by Felix Adler

For Eutychius,149 bishop of that city, taught, that our body, in the glory of resurrection, would be impalpable, and more subtile than wind and air.

From Bede's Ecclesiastical History of England by Cuthbert Bede

Bread is a binder, and for that abolisht even in their Ale, whose lost room fills an apple, which is more airy and of subtiler nature.

From The Scornful Lady by John Fletcher

No, his temperament needed a subtiler atmosphere than this, rarer essence than mere brutal freedom.

From The Atlantic Monthly, Volume 08, No. 50, December, 1861 by Various

Something keener than philosophy, subtiler than Epicurus, pricked Fred, as Minnie vanished into the cloud of snowflakes.

From The Atlantic Monthly, Volume 03, No. 18, April, 1859 by Various

Gradually he wove a drama round it; line by line it took shape for a book that was to be subtiler, finer and more sincere than anything that he had ever written.

From The Education of Eric Lane by Stephen McKenna

No, his temperament needed a subtiler atmosphere than this, rarer essence than mere brutal freedom The East, the Old World, was his proper sphere for self-development.

From Margret Howth, a Story of To-day by Rebecca Harding Davis

He saw it was lovable, and he made it the theme of his noblest poems, his subtilest philosophies, and his highest Art.

From The Atlantic Monthly, Volume 07, No. 44, June, 1861 Creator by Various

In such spaces he may dream his dreams, tell his stories, and stamp on them for centuries his subtilest and divinest thoughts.

From Scientific American Supplement, No. 799, April 25, 1891 by Various

I can say, from an experience of over a dozen years, that pupils between twelve and fifteen years of age are immensely interested in such discussions, and are capable of making the subtilest distinctions.

From The Moral Instruction of Children by Felix Adler

The notion of nonentity may thus be called the parent of the philosophic craving in its subtilest and profoundest sense.

From The Will to Believe : and Other Essays in Popular Philosophy by William James

Truth is a point; the subtilest and finest; harder than adamant; never to be broken, worn away, or blunted.

From Imaginary Conversations and Poems A Selection by Walter Savage Landor