abstruseness in expression is very frequently regarded as an indication of profundity.
"The Young Man and the World"
Albert J. Beveridge
"Readily; I have solved others of an abstruseness ten thousand times greater.
"Selections From Poe"
J. Montgomery Gambrill
It may possibly be true that, in some of those fields of discovery which lie open to such rough observations as can be made without artificial methods, the great explorers of former times have appropriated most of what is valuable, and that the gleanings which remain are sought after, rather for their abstruseness, than for their intrinsic worth.
"Five of Maxwell's Papers"
James Clerk Maxwell