I love this quote, for me it motivates mastery of my creative skills. Play is a important part of developing theses skills , and in turn sharpen our minds. Also this happens to build others parts of our brain and we become a better version of ourselves.
Books to read...I've already read 13 books on this list and agree with each of their inclusion or at least their series. At least 1 is sitting on my to be read book shelf and two more are on my to be read list. In other words, this list is pretty awesome.