Epigraphs in Le Guin's Lathe of Heaven

In The Lathe of Heaven (1971) Ursula K. Le Guin starts each chapter with an epigraph.  Here are some of the one which particularly caught my attention.

Chapter 3
Those whom heaven helps we call the sons of heaven.  They do not learn this by learning.  They do not work it by working.  They do not reason it by using reason.  To let understanding stop at what cannot be understood is a high attainment.  Those who cannot do it will be destroyed on the lathe of heaven.
--Chuang Tse:  XXIII

Chapter 4
Nothing endures, nothing is precise and certain (except the mind of a pedant), perfection is that mere repudiation of that ineluctable marginal inexactitude which is the mysterious inmost quality of Being.
--H.G. Wells, A Modern Utopia

Chapter 8
Heaven and Earth are not humane.
--Lao Tse:  V

Chapter 9
Those who dream of dream of feasting wake to lamentation.
--Chuang Tse:  II

The epigraph for Chapter 3 is particularly interesting on the overall topic of nature versus nurture.  It can apply to a broad range of talents and abilities.