Oh, I forgot the most significant addition to your text. That of mental "effort".

(Modern) minds are used to expect to understand a text smoothly, balanced, without irritations and disturbances. One wants to understand "quickly", "effort-less", one doesn't like further expressions which basically repeat the already expressed and feels that the intelligence of the reader is offended by continuously repetitions of "the same".

But I'd say it's effort in the first place which leads to a deeper understanding of a text, of which otherwise a reader may slightly just brush or stroll along, hands in his pockets. Having a feeling "Oh, that's so nice. I got it." Turning around the corner and forgetting about it completely.

Also, paradox or absurd formulations and seemingly unsolvable riddles lead the mind - which only wants to experience comfort - to stumble. This stumbling creates irritation. If one interprets this irritation not as "I feel impatient!" but as "I feel irritated. Irritation gets me thinking more deeply, therefor it's good to be irritated", this difference already grants me another approach to the topic of comfort zone."

One finds these absurd formulations and riddles often in Zen-anecdotes.