Too much brightness blinds the eyes.
Too much sound deafens the ears.
Too much flavor ruins the tongue.
Chasing desires to excess turns your mind towards madness, and valuing precious things impairs good judgment.
The wise are guided by inner needs, and are not concerned with the senses. Therefore the wise person rejects the without, while embracing the within.
(from Tao Te Ching, verse 12, translation by Robert Brookes)