Just came from teh zazen.  Just had a lesson rightly taught to me.  Prompted a very clear and powerful realization.

Making an assumption about anything is an inherently selfish act, even out of noble or helpful motivation.  By doing so, you essentially are saying that you know what The Universe is going to send you.

Making an assumption is antithetical to Buddha-mind.  Always.  Nirvana must be one continuous utter marvel, wonder and amazement, because to think for a single instant that you know what's next or what may be asked of you is utterly arrogant, and not Buddha-mind.  Each moment arrizing is a whole and total universe of miracles and surprizes.  That is Beginner's Mind.

Or so I assume.

Thank you, sensei...