Is evolution a theory, a system, or an hypothesis? It is much more: it is a general condition to which all theories, all hypotheses, all systems must bow and which they must satisfy henceforward if they are to be thinkable and true.

However far back I go into my childhood, nothing seems to me more characteristic of, or more familiar in, my interior economy than the appetite or irresistible demand for some 'Unique all-sufficing and necessary reality.'

Evolution is a light illuminating all facts, a curve that all lines must follow.

Pierre Teilhard de Chardin Quotes