US-P16.052ab ।US-P16.052cd ॥
In plain words
Because mental cognition and the feeling of happiness cannot happen at the exact same instant, and because the mind can only connect to one thing at a time, pleasure must remain ungraspable as an object of cognition.
Close to the Sanskrit
And because happiness and cognition cannot occur simultaneously due to non-conjunction, and because mind-contact is the sole cause, there is the ungraspability of happiness too.