By the practice of the different parts of Yogas the impurities being destroyed, knowledge becomes effulgent up to discrimination.
In plain words: By practicing the different parts of yoga, the impurities of the mind are removed. Then knowledge shines brighter and brighter until clear discrimination is reached. First we must gain control of body and mind.
Now comes the practical knowledge. What we have just been speaking about is much higher. It is away above our heads, but it is the ideal. It is first necessary to obtain physical and mental control. Then the realisation will become steady in that ideal. The ideal being known, what remains is to practise the method of reaching it.
Namaste.
A calm guide to life, the mind and the old teachings.