Action Periods of tranquillity are seldom prolific of creative achievement. Mankind has to be stirred up. Periods of tranquillity are seldom prolific of creative achievement. Mankind has to be stirred up.YOU MAY ALSO LIKE »Ideas won’t keep, something must be done about them.Familiar things happen, and mankind does not bother about them. It requires a very unusual mind to undertake the analysis of the obvious.We think in generalities, but we live in detail.Everything of importance has been said before by somebody who did not discover it.Speech is human nature itself, with none of the artificiality of written language.An enormous part of our mature experience cannot not be expressed in words.