The repeating patterns of thought, the ones that we have had thousands of times before, are there all the time in the background.
They are so normal that we do not notice them. It is like static or white noise, playing 24/7.
These thoughts are not constructive, positive or new.
To find them we need to bring awareness and consciousness to ourselves. It is a bit like shining a light into a dark cave, these thoughts hide deep in the cave, deep in our unconsciousness.
If we remain in the moment, present, conscious, and awake, then the light shines on them, once we see them we can then choose to change them, to stop them. Once the light is shined on them they can not survive.
Consciousness is achieved when we allow our thoughts to be, simply witnessing them and not responding so as to not energise them. If we focus on the beauty around us, the noise, the light, the smells, the sounds, our own breathing and inner energy, then we can take that light into the cave and find those deep unconscious thoughts.