US-P17.022ab ।US-P17.022cd ॥
In plain words
Just like a clean mirror, when the mind is purified, the light of knowledge shines forth within it. That purification is brought about through steady moral restraints, rituals, and austerities.
Close to the Sanskrit
For in the mind, like a mirror, when purified, knowledge shines forth; by constant restraints, sacrifices, and austerities is its purification.