Something happened the other day that reminded me of just how little knowledge, never mind control, we have over our minds. N.B. By "we", i mean "me". And thinking about it, it's preobably irresponsible to make such a generalisation.

Well i'd got off the bus in holmfirth, and had started walking between the bus stop and the large hill that i live half-way up. "Left outside alone" by Anastasia drifted into my head, and i didn't really question it because it happens all the time. (Not with that particular song. With a song...)
And after walking for about 100 yards in a busy, noisy town centre, I walked past a pub from which emanated the same song, and in exact synchronisation with the version in my head.
Assuming (and i hold this to be a fair assumption) that it wasn't just a coincidence, this means that my subconscious mind is in the habit of spending its energies filtering out pop songs from the surrounding noise, at a level of effectiveness that far, far exceeds any conscious ability of mine.

I wonder if it can be made to practice maths problems while i sleep...