So you are thinking, or, there is thought, doing its ahead and behind thing, going over the past, planning ahead. Then you realise this and there’s a resistance, as if thought is bad somehow. The tendency then is to stay in that slightly guilty feeling for a while, thought having been stepped upon by the ‘no, you shouldn’t be thinking.’ So the ‘shouldn’t be thinking’ feeling is the master for a while, but thought will come back somehow. That’s the tendency.
How about continuing to think despite the feeling that you shouldn’t be thinking? Then you get a much more interesting situation, a game, a play between the two thoughts, more equal. The original thought cannot exactly do what it would do without the ‘shouldn’t be thinking’, and the ‘shouldn’t be thinking’ doesn’t get it’s victorious (if slightly guilty and violent) residential.
Then something new can happen because the thought won’t ‘come up’ as it’s already up and the no won’t ‘no’ because it’s already ‘no-ing’, and the game will naturally cease after a time, allowing a fresh energy and understanding, awareness.
Thought does not ‘come up’. More like ‘drives in’, but the concept of feeling of it ‘entering something’ needs to be questioned. Just because it’s a common experience doesn’t make it true.