Equipoise

e·qui·poise (kw-poiz, kw-)
n.

1. Equality in distribution, as of weight, relationship, or emotional forces; equilibrium.

2. A counterpoise; a counterbalance.

3. Equilibrium and poise. The sublime balance of emotion.

4. The state of being perfectly balanced; equilibrium.

5. Equality of distribution; counterbalance, equilibrium, balance
structure, construction - a thing constructed; a complex entity constructed of many parts; "the structure consisted of a series of arches"

6. Conformation - a symmetrical arrangement of the parts of a thing.

7. Symmetry, proportion - balance among the parts of something.

8. A state of being equally balanced; equilibrium; -- as of moral, political, or social interests or forces.

examples:

"What matters is the poetry, and the truest readings of it "are those which are sensitive to the strangeness of Marvell's genius: its delicate equipoise, held between the sensual and the abstract, its refusal to treat experience too tidily, the uncanny tremor of implication that makes the poems' lucid surfaces shimmer with a sense of something undefined and undefinable just beneath."
~ James A. Winn, "Tremors of Implication", New York Times, July 9, 2000

"I cannot see how the unequal representation which is given to masses on account of wealth becomes the means of preserving the equipoise and the tranquillity of the commonwealth."
~ Edmund Burke, "Reflections on The Revolution In France"

"Our little lives are kept in equipoise
By opposite attractions and desires."
~ Henry Wadsworth Longfellow, "Haunted Houses"