Periods of tranquility are seldom prolific of creative...
Periods of tranquility are seldom prolific of creative achievement. Mankind has to be stirred up.
![Alfred North Whitehead Quote About Achievement, English Mathematician, Periods, Seldom: Periods Of Tranquility Are Seldom...](http://qt.azureedge.net/resources/quotes-images-large/periods-of-tranquility-are-seldom-prolific-of-creative-achievement-mankind-has-t-7c76611461223f99918586731bda5e78.jpg)
Periods of tranquility are seldom prolific of creative achievement. Mankind has to be stirred up.