Entropy

My favorite law in physics is The Second Law of Thermodynamics.

The second law of thermodynamics establishes the concept of entropy as a physical property of a thermodynamic system. Entropy predicts the direction of spontaneous processes, and determines whether they are irreversible or impossible, despite obeying the requirement of conservation of energy, which is established in the first law of thermodynamics (Source: Wikipedia).

Short and simple it says that everything falls apart...

This is how I see it in my garden, with all beautiful flowers and trees I share my space and life with. 

Reversible! ;-)