Inertia and mediocrity are the result of indecisiveness and low commitment. (Almost sounds like a definition of bureaucracy, huh?).
Our non-negotiable tenets (i.e., values, beliefs) anchor us to that which is "important." We must be rigid in our commitment to those anchors.
The day-to-day deployments - schedules, strategies, processes, habits - should always be focused on that big picture vision of "where we're going." Yet, they must be malleable, adaptable, modifiable, always subject to improvisation. The deployments are most energetically achieved when there is flexibility built in (and freely allowed, even encouraged).
Rigid in the commitment to our vision. Flexible in the deployments that move us forward.
Flexible rigidity is not an oxymoron.