Summary: The probability of stability.
Quotations [58]: "Tous les actes aussi variés soientils, n'ont qu'un but, celui de maintenir constantes
les conditions de la vie dans le milieu intérieur." Claude Bernard. 3093. [~ "All such various acts have only one purpose, to maintain the constant conditions
of life in the internal milieu."]

Summary: If the f in the canonical equation behaves as a Markoff chain, the variable's behaviour is
 Brownian movement with drift. Brownian movement canonical equations of Stochastic processes differential equations

3093 
3094 

