This much-revered Taoist text which was (or was not) written by a sage called Lao Tzu in the 5th century BC is split into 81 mini chapters and is considered one of the gems of Eastern culture.
It's basic message is consume less and want less and enjoy life and its simple pleasures but it contains so much more.
My favourite quotes so far after giving it a second read are:
'To know others is wisdom
To know yourself is enlightenment.'
'The sage consider the stomach
And rejects the eyes.'
'Nothing in the world is softer or weaker than water
Yet nothing is better at overcoming the hard and strong.'
It's so tied into the martial art I study it's not true. These remain things to ponder with a black belt grading on the horizon...