A thought travels faster than light. When I create a thought, it is at that instant itself that it reaches the other person. A human mind creates fifty to sixty thousand thoughts in a day! This is the case when a day goes normal, whereas at other times this number is even higher.
Nothing much is considered lost when a thought is created which was not meant to be created. It could be something created out of anger or it could simply be a waste thought.
The lower the quality, the higher the number. But at other times it is also recommended to not try to stop the thoughts as it will created pressure on the mind.
These thoughts are like cars coming with speed. If thoughts are cars then my many belief systems are different routes.
Beliefs change with knowledge. The best and most effective knowledge is that of knowing the original self.