Doubting
Questioning and doubting are two very different mental actions.
Questioning is a necessary step to the acquisition of knowledge.
Doubting is refusal to listen, refusal to think, refusal to look within, refusal to understand.
Designation
The reality is one, sages designate it variously.
Truth
God is the bed of the river, and all experiences are its waters which flow on and on from immemorial past to unforeseeable future.
In the light of this truth, the shadow called the ego vanishes.
Magnitude
Meditation on the magnitude of the universe will save you from the worries of the moment.
Purification
Semi-purification is not purification.