Definition of the logic or form or nature[1], of an equilibrium (or we can dare equilibrial)

There the form is understood in its totality[2] so in an internal and external way. What taken generally means the set of the relations between all the parts of a body, then which is characteristic of it, and thus necessary in its totality for its existence defined as an equilibrium, so resistant, and except God limited in space, therefore of which the environment can change.
[1]: See René Descartes, Meditations, 6th meditation, § 21. \ [2]: See G. W. Leibniz, Monadology.