In the wordless observation of the breath, there are two states to be avoided: thinking and sinking. The thinking mind manifests most clearly as the monkey-mind phenomenon we have just been discussing. The sinking mind is almost the reverse. As a general term, sinking denotes any dimming of awareness. At its best, it is sort of a mental vacuum in which there is no thought, no observation of the breath, no awareness of anything. It is a gap, a formless mental gray area rather like a dreamless sleep. Sinking mind is a void. Avoid it.
