Sri Aurobindo’s correspondence with Nagin Doshi from 1933-1937.
Ananda is a thing to be felt — it cannot be defined except negatively that it is not mere joy, but something much more deep and essential.
You have to learn by experience. Mental information (badly understood, as it always is without experience) might rather hamper than help. In fact there is no fixed mental knowledge for these things, which vary infinitely....
There is very often a complaint of this kind made during the course of the sadhana. I suppose that the usual action of memory is for a time suspended by the mental silence or else by the physical tamas.
Something in your physical mind stiffens and begins to defend its views. It is better to wait till it is more supple and plastic. Mental discussions are not good for sadhana but only for clarifying the intellect which is not so important at this stage as other things.
Reject always without getting disturbed by the recurrences.
Study cannot take the same or greater importance than sadhana [...] If the sadhana were active then study can be done in the spare time i.e., in times not given to work or meditation.