Question to Maharishi Ramana.
Pilli asked the question in 1902 when Maharishi Ramana was silent. The answer was given in writing.
How long, should the inquiry be practised?
Answer: As long as there are impressions of the objects in the mind, so long as the inquiry “Who am I ?” is required. As thoughts arise they should be destroyed and then and there in the very place of their origin, through inquiry. If one resorts to contemplation intermittently until the self is gained, that alone would do. As long as there are enemies within the fortress they will continue to Sally forth; if they were destroyed as they emerge, the fortress will fall into our hands.
There is no need to comment on it. The subject is clear.