A friend of mine asked me this question recently, in relation to current life decisions:
What do you know that you don’t want to know?
For me right now, that I am not quite ready yet. I am not ready to move forward in life, decisively, until something has moved in me a little more. Thoughts say it’s partly because of health, and the dark night of the soul (and transformation of the will). Confessing this to myself feels good, it’s a relief, it’s something I do and don’t want to know. And it may change any time.