be not to know

be not to know

To not be able to know something in advance. We aren't to know the path that life will take us on.
See also: know, not
Farlex Dictionary of Idioms.

be not to ˈknow

have no way of realizing or being aware that you have done something wrong: ‘I’m sorry I called when you were asleep.’ ‘Don’t worry — you weren’t to know.’
See also: know, not
Farlex Partner Idioms Dictionary
See also:
  • Adam's off ox
  • as you know
  • I know you are but what am I?
  • know (something) in (one's) bones
  • before you know where you are
  • in the dark, to be/keep someone
  • be in the dark
  • before you know it
  • I know
  • as we know it