। ॥ ४३ ॥
In plain words
Ritual action by itself never gives rise to knowledge — not without a teacher, that bottomless store of compassion. The Veda itself has settled the sense of it: the one who has a teacher is the one who knows.
Close to the Sanskrit
By actions alone knowledge does not arise, without a guru who is a treasury of compassion; because the meaning of 'a person possessing a teacher knows' is established by the Veda.