Rama says, it fills fiels like a vicious circle. If you know yourself and can rest in atman, enunciation would be a natural state. Yes, for knowing ourselfs very high level of renunciation is required, yes, but not a vicious circale. Knowing about ourself, it comes from all this, from the study of beraanta,. From looking at the lives of lightened beings, that's why these verses are important.