Evolution is a force that pushes live forward without any purpose even without us.
The human brain distinguishes from animal brain, by reflecting on its existentiality. It is this mechanism of the human brain that has manifest itself through its entire history in art, religion and science.
The grand aim of all science is to cover the greatest number of empirical facts by logical deduction from the smallest number of hypotheses or axioms. Einstein
The laws of nature are the same at every place and at any time but their observation at a macroscopic scale can range from regular to random due to the amount of averaging that took place in the aggregation from micro to macro scale. What we call random is just a process with a high variation around its mean.
A unit of energy added to a system causes a redistribution of the potential energy of its constituent parts such that the total change of potential energy follows a power law.