Reference request for "our Buddha nature chooses not to be enlightened"? I seem to remember that Mahayana Buddhism said somewhere something along the lines of, "Our Buddha nature (or the Buddha) chooses not to be enlightened". 

I am not sure if I am remembering this correctly. Does anyone know the teaching to which I am referring, and would someone be so kind as to clear this up, perhaps with some sort of quote, for me?
When a sight comes before the eyes, a sound to the ears or a smell to the nose, there is no choosing involved here in terms of seeing, hearing or smelling. The seeing, hearing &amp; smelling occur automatically, without choosing. 

Similarly, when the mind is actually getting enlightened by experiencing the truth, it is not involved in choosing. 

The mind may choose to establish itself in the path, that is, choose to develop concentration. However, the path is only the path &amp; not the destination. 

Developing &amp; establishing concentration is similar to removing dust from the eyes, wax from the ears or mucus from the nose. 

When the concentration is complete, i.e., when the mind is lucidly clear, the enlightenment occurs without any choosing.