Generally, many different states and starting conditions will tend toward the same stable equilibrium.

At this low stable equilibrium level, both the rate of investment and saving are low.

These phases are the temperatures where heating and cooling can reach a stable equilibrium.

A stable equilibrium of the particle can not exist and there must be an instability in at least one direction.

This shows that the second law of thermodynamics can be stated in terms of the existence of stable equilibrium states.