। ॥ ५५१ ॥
In plain words
From the direct experience of 'I am full of resolve, I am full of worry, I am full of doubt,' it is clear that the inner self is deeper than the breath, consisting of the mind.
Close to the Sanskrit
From the experience of 'I am full of resolve, I am full of worry, and I am full of doubt,' and so on, the inner self is other than the breath, being made of mind.