But it only takes a doubt. A drop of ink falls into a clear glass of water and clouds the whole thing. So the moment after I realised I wasn’t perfectly well was the moment I realised I was still very ill indeed

But it only takes a doubt. A drop of ink falls into a clear glass of water and clouds the whole thing. So the moment after I realised I wasn’t perfectly well was the moment I realised I was still very ill indeed (Matt Haig, Reasons to Stay Alive)