No belief whatsoever, no doctrine. Only what is confirmed and sustained by what happens, and trusting this absolutely, even though moment after moment it disappears like smoke. And going deeper and deeper with questioning until there's no possibility of an answer one could repeat, define, or even precisely know. Instead the dawning of a certainty. And then the constant letting go of that certainty in the willingness to stand in the middle of uncertainty, because uncertainty is the only thing that has the rock solid feel of truth.
Uncertainty is readiness.
It is only a problem and a weakness when there lies underneath it the desire for a secure outcome. But in reality no outcome suffices, no outcome can rise to the level of this thoroughgoing questioning. No outcome can match the panoramic glory and color of the imagination. Uncertainly is pregnant with constant possibility. It's an endless adventure.