A soil naturally good becomes by neglect barren, and the better its original condition, the worse its ultimate state if uncared for.
 Plutarch, Moralia (c. 100 AD). copy citation

add
Author Plutarch
Source Moralia
Topic state neglect
Date c. 100 AD
Language English
Reference
Note Translated by Arthur Richard Shilleto
Weblink http://www.gutenberg.org/files/23639/23639-h/23639-h.htm

Context

“and the crooked staves of actors can never be made straight. But by toil what is contrary to nature becomes stronger than even nature itself. And are these the only things that teach the power of diligence? Not so: ten thousand things teach the same truth. A soil naturally good becomes by neglect barren, and the better its original condition, the worse its ultimate state if uncared for. On the other hand a soil exceedingly rough and sterile by being farmed well produces excellent crops. And what trees do not by neglect become gnarled and unfruitful, whereas by pruning they become fruitful and productive?” source