Rest is not idleness, and to lie sometimes on the grass under the trees on a summers day, listening to the murmur of water, or watching the clouds float across the blue sky, is by no means a waste of time.

"Lubbock spoke from experience. He himself was an innovator in the world of finance, a noted archaeologist (he coined the terms Neolithic and Palaeolithic, and used his wealth to save the ancient stone circle at Avebury), and a political reformer who led the campaign for bank holidays; yet he found time to retreat to his family estate at Downe in Kent, where he spent time playing cricket, entertaining friends, and talking about natural history with his nextdoor neighbour Charles Darwin." - Alex Soojung-Kim Pang 

Article: How to Rest Well