15. How long should inquiry be practised?

As long as there are impressions of objects in the mind, so long the
inquiry "Who am I?" is required. As thoughts arise they should be
destroyed then and there in the very place of their origin, through
inquiry. If one resorts to contemplation of the Self unintermittently,
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
are destroyed as they emerge, the fortress will fall into our hands.

16. What is the nature of the Self?

What exists in truth is the Self alone. The world, the individual soul,
and God are appearances in it. like silver in mother-of-pearl, these
three appear at the same time, and disappear at the same time. The Self
is that where there is absolutely no "I" thought. That is called
"Silence". The Self itself is the world; the Self itself is "I"; the
Self itself is God; all is Siva, the Self..................From the
SPIRITUAL TEACHING of RAMANA MAHARSHI Introduction by C.G.Jung chapter:

LGH