All there is to thinking is seeing something noticeable, which makes you see something you weren't noticing, which makes you see something that isn't even visible. ↗
In the last year my wife has noticed me struggling to get downstairs on a Sunday morning. I've two young children and football has been so good to me over the years I don't want to spoil it. ↗
I never answer if someone knocks on my door and only the band and my manager have my phone number. In any case my phone doesn't ring so I never notice it. I occasionally just walk past and pick it up to see if anyone's there. ↗