But surely, speaking carefully, we do not sense 'red' and 'blue' any more than 'resemblance' (or 'qualities' any more than 'relations'): we sense something of which we might say, if we wished to talk about it, that 'this is red.
A few weeks after the worst day, I started writing lots of letters. I don't know why, but it was one of the only things that made my boots lighter.