Sri Aurobindo
Letters of Sri Aurobindo
Volume 2. 1935
Fragment ID: 17483
1935
I can see why the mind or the inner being gets veiled by the tamas, but find no reason for the soul or self to be so, especially after a long sadhana.
You forget that the self and the soul were covered for a long time, thousands of lives. So now although they are unveiled, it needs still some tapasya to keep them always so.