nothing could be further from my mind

nothing could be further from my mind

That is the complete opposite of what I'm thinking. A: "You're regretting settling down and having kids, aren't you?" B: "No, nothing could be further from my mind!"
See also: could, further, mind, nothing
Farlex Dictionary of Idioms.
See also:
  • what(ever) will be, will be
  • many is the
  • raise (one's) sights
  • raise one's sights
  • raise sights
  • raise your sights
  • raise/lower your sights
  • what must be, must be
  • opportunity knocks
  • pretty face, more than a/not just a