to be clear to someone, to make sense to someone
Das sollte Ihnen als Offizier eigentlich einleuchten.
As an officer, that really ought to be clear to you.
— Der Hauptmann (2018)
Deine Logik will mir nicht einleuchten.
Your logic doesn't make sense to me.
Das will mir nicht einleuchten.
That doesn't make sense to me.
This must be obvious to everyone.