। ॥ १४८ ॥
In plain words
Within the inner sound there is a light, and it has been shining there all along. Let the mind dissolve into it, and there is nothing left to bind you to saṃsāra again.
Close to the Sanskrit
The light abiding within the nāda — which indeed has been present long — if the mind is dissolved there, then not again for the bondage of saṃsāra.