First it appears like this, then it appears like that – in such a way that it is quite impossible to understand it. This is why it is called the Unknown Head. If nothing at all were visible in it, we would have said it is concealed. However, it is seen – but first it seems one way, and then immediately afterwards it seems different, so that no one can understand it.
The difference between the Dew of Bedolach and the Unknown Head