There is a very interesting quotation by the Buddha himself in relation to his own thoughts: I would like to relate the details. One of his disciples told the Buddha: You have so many powers, you have so many miraculous powers. And the Buddha said: My greatest miracle is that when a thought arises, I know a thought has arisen; when a thought continues, I know that a thought continues when the thought disappears, I know the thought disappears.
This shows it is not the absence of thought which is important. I like that very much. So we can try to work on the third aspect: when a thought disappears. For someone to have that type of mind they have to have a very calm mind, an alert mind, just to know when a thought disappears.