I have been practising breathing meditation. In my meditation, with my eyes closed I am focussing on the sensation of the breath as it passes in and out of the nose, not following it, just being aware of it as it passes the nostrils.
The problem I am having however is that I find it very difficult to fix my awareness onto a sensation without visualising the sensation/body part and what is happening. So for instance when I feel the air contacting with my nose I instinctively find that I am actually visualising in my mind what is happening, a nose and air passing over it. I have tried to focus on only the sensation without at the same time visualising what is occurring but I find this very difficult.
Is it normal to do this, as I my understanding was that the aim of the practise was to maintain awareness on a single thing, such as the sensation of breath and nothing else. If I am visualising what is happening, then my mind will be split between being focussed on the visualisation and also the sensation.
Is there a method to stop this?