Which words in this quote about personal essays from author Barry Lopez are examples of oxymoron?

It is, I think, the rarest of leisure, hard work mixed with hard pleasure, to refine one's time of deep thought or light regard into the utterly self-absorbed and equally and abundantly outward-seeking shape of the personal essay—a story comprised of found fact, of analyzed emotion, of fictive memory.

A. hard work
B. hard pleasure
C. deep thought
D. outward-seeking