। ॥ ६६४ ॥
In plain words
The mere absence of suffering can be found in a lump of clay, but it is not experienced as joy; yet the subtle touch of happiness is directly experienced by everyone in deep sleep.
Close to the Sanskrit
The absence of suffering, however, exists in a lump of clay etc., but is not experienced; (while) even a trace of happiness of all is directly perceived, this indeed.