Mental Development and Sadhana

Q: Do you suggest that people here should have some mental development if possible? Would it really help the sadhana?

I don’t know if it helps the sadhana and I don’t quite understand what is meant by the phrase. What is a fact is that mental like physical work can be made a part of the sadhana, – not as a rival to the sadhana or as another activity with equal rights and less selfish and egoistic than seeking the Divine.

– Sri Aurobindo