Hand-in-hand with thinking about that, I also had a thought to a few years back when I'd heard some 'far out' theory about a habit taking 21 days to break.
'How can that be true?' I doubted.
Doubted by me the true 'couch-ref' who had such strong opinions about it, but the cheek of me and my no-substance criticism! I had no right to condemn the theory as much as I had nothing to back myself up about it because if the truth be told, I'd never tried to prove the theory right or wrong anyway. So my spouting comment meant nothing back then, as much as it means nothing now.