When one is meditating properly, it is entirely possible to think,
and the point is, that for the thought to arise at all,
there must be an aware and alert quality of mind.
Thus, when one is using this approach in meditation,
given that there is a spacious and transparently clear quality to the experience,
there is also the dynamic spark of awareness.
To be aware of the thoughts that arise in the mind,
be they nominally good or bad,
is itself an expression of that spark.
The specific nature or content of the thought is not the issue;
it is the awareness which is important.