The self is totally comprised of thought, thus the one who thinks they are a self lives according to the limitations created by the doubts they hold for their self. In this way, self identified individuals become more doubtful as they accumulate life experience.
A habit of doubt is created and perpetuated by resisting aka judging and repressing doubt, while embracing doubt as it arises leads to its resolution – not because anything was done, but because detached awareness naturally resolves the subconscious foundation of whatever dissonant thought pattern is being observed.
Instead of allowing doubt, the ego may scream that one ‘should’ use faith to replace doubt, but ‘should’ itself is the language of doubt. It’s all God, and ‘should’ says that something about God needs to be ‘fixed’.
Trying to limit doubt by covering it with faith is really repression. In this way, the shadow of doubt expands in the subconscious and projects doubtful experiences thus reinforcing the illusion of separation – which is the source of all dis-ease.
In the moment one remembers ‘who they are’, doubt immediately disappears. However, remembrance cannot occur while doubt is present because the foundation of doubt is belief in separation. Acceptance bridges the gap, and allows remembrance to ‘happen’.