You know, Master Dogen used to use interrogatives ... like "What?" ... as affirmatives ... like "What!" ... (For example, in one section of Shobogenzo, he takes a question by the sixth ancestor Hui-neng “ What is this that comes thus?” and changes it into an affirmation, something like "Yes, WHAT THUS COMES!")
By "Great Not Knowing", I mean that there are so many questions we might have about this life ...
... and sometimes, in this Practice, those Big Questions are answered for us, very clearly and precisely. Our Practice provides some very specific (and wonderful) answers to some 'Big Questions' when we approach the problem differently from our usual ways.
... and sometimes, in this Practice, those questions drop away for the very question was of our own making all along (like "how many angels on the head of a pin"), also a very clear answer of sorts.
... and sometimes, in this Practice, there are things about life we small human beings still cannot know ... but that's cool. Some mysteries remain, but we yield to that, allow that, let the mysteries remain mysterious. That "allowing" is a very clear answer too in its way. I sometimes compare us to the young infant who cannot understand the shadows passing before its eyes as food is placed in its mouth ... like the husband who will never know every mysterious aspect of his own wife ... yet knows, yet trusts, yet fully understands somehow.
Shikantaza is thoroughgoing, intense, to the marrow dropping of all searching (even as we search), whereby there can be no thought of doubt even as we doubt. Do we doubt or free ourselves of doubt? NO DOUBT! Sitting itself is Great Doubt Awakening realized, the mystery of the Genjo Koan come to life ... the great constantly answered-unanswered Koan that is right before our eyes.
Who will win the World Series next year? What is God's shoe size? What is the cure for cancer? Not even a Buddha knows for sure. Why do bad things happen, why is life and this world the way it is? Some possible Buddhist answers, yet more questions. But what is the Answer shining in/as/through-and-through all the questions?
Buddha (Big "K") Knows.
When we get beyond our daily mind of analyzing, naming, and figuring out, there is just a Big Know ... much as one truly comes to merge into a love relationship or experiencing a sunrise (even if not knowing every aspect and mystery of one's lover or of the sun) when we stop "thinking about/critiquing/narrating" what we are doing as we are doing it, and Just Do, Just Allow, Just Be. Thus is the certain knowing of a breeze on the cheek, a raindrop, child's smile, a grain of sand ... each and all fully known to hold all time and space, and to shine like a jewel.