
There can be no rule in these matters, except one 'the outer is transient, the innermost - permanent and changeless', though ever new in appearance and action.
The outer self and the inner both are imagined. The obsession of being an 'I' needs another obsession with a 'super-l' to get cured, as one needs another thorn to remove a thorn, or another poison to neutralize a poison.
Silence is the main factor. In peace and silence you grow.
Trust the teacher. Take my own case. My Guru ordered me to attend to the sense 'I am' and to give attention to nothing else. I just obeyed. I did not follow any particular course of breathing, or meditation, or study of scriptures.
Whatever happened, I would turn away my attention from it and remain with the sense ‘I am', it may look too simple, even crude. My only reason for doing it was that my Guru told me so. Yet it worked! Obedience is a powerful solvent of all desires and fears.
Just turn away from all that occupies the mind; do whatever work you have to complete, but avoid new obligations; keep empty, keep available, resist not what comes uninvited. In the end you reach a state of non-grasping, of joyful non-attachment, of inner ease and freedom indescribable, yet wonderfully real.
Things happen as they happen; blame or praise are apportioned later, after the sense of doership appearing.
Considering the endless list of factors required for anything to happen, one can only admit that everything is responsible for everything, however remote. Doership is a myth born from the illusion of 'me' and 'the mine'.
You have invented words like effort, inner, outer, self, etc. and seek to impose them on reality. Things just happen to be as they are, but we want to build them into a pattern, laid down by the structure of our language.
So strong is this habit, that we tend to deny reality to what cannot be verbalised. We just refuse to see that words are mere symbols, related by convention and habit to repeated experiences.