You might believe your thoughts are just between you but G-D is listening too. G-D knows when your actions don’t match your intentions and will add or minus that to your balance sheet. In the biblical story of Baalam, G-D knew that his intentions was to do harm to the Israelites and stopped him to show who was really in charge of the scenes. We might similarly think we can get away with it if our actions appear good but truly aren’t but G-D is looking behind our curtain every step of the way as G-D will decide who gets a standing ovation and who will walk away with tomato hair.