Equipoise

To my mind, the textual arguments in this case are close to equipoise.

Government was unnerved, confounded, and in a manner suspended. Its equipoise was totally gone.

“An easy evasion”, retorted the excited bride, who had lost her mental equipoise.

The words were not without emotion, and retained their level tone as if by a careful equipoise between imminent extremes.

And I saw him thus absorbed in godly pursuits in the midst of business, not once or twice, but very often. I never saw him lose his state of equipoise.

Perhaps that quality which existed, in spite of the equipoise against it, in Sir Howard, was fidelity in friendship.

The cone's not fixed, it's hung by a chain from a lever, and balanced by an equipoise.

Her smiling equipoise is a statement of self-confident power against his sour fuming.