the mind [boggle]
1
used to convey surprise, shock, or disbelief in response to something that is difficult to comprehend or absurd
- The speed at which technology is advancing these days boggles the mind.
- The complexity of the puzzle boggled her mind.
- The sheer number of people at the concert boggles the mind.
- The price of that car boggles the mind—it’s more than a house!
- When I saw the list of ingredients, my mind boggled—there were at least twenty things I’d never heard of.