“You can never hide what you are. The gateway to your soul is thru your eyes. You can tell a lie but the truth is kept in your eye!”
-- The Crazyhorse
The truth can be found thru your eyes. That’s why it would be better to have eye to eye contact to get to know the person if he/she is telling the truth. Being honest can only be known thru your eyes that give reflection on your level of sincerity.