It is said that nothing can cause Spiritual Realization. That it is effortless. Can you comment?
There seems to be a misunderstanding there.
What is effortless is Pure Consciousness. That is realized to be our Nature upon the event of enlightenment or awakening for the simple reason that it is all there is. That is an event that reveals that something we believed existed really does not exist except a specific form of imagination. Pure Consciousness remains as is.
There is no entity creating Pure Consciousness. Neither is it “transmitted” by the guru. It is, and it is all there is in reality. It then manifests as mind and then the law of cause-and-effect begins to operate.
Therefore the event of awakening or the event of the final Spiritual Realization, which may come later, are definitely caused. They are “things” that happen as a result of other things that came before.
The point however, is that they are not caused solely by “my” desire or “my” efforts. They are caused by a multitude of factors both within the realm of personal choice and outside it.
The relevant aspect of the issue of cause-and-effect and Spiritual Realization refers to the subtle but powerful pervading belief that we have, in some magical way, sole control and responsibility over destiny. That belief must be investigated as it is a dimension of the root of psychological suffering.