Conversation with Jean Martet (18 December 1927), Ch. 11, p. 167. 
Clemenceau, The Events of His Life (1930) 
Context: A man who waits to believe in action before acting is anything you like, but he’s not a man of action. It is as if a tennis player before returning a ball stopped to think about his views of the physical and mental advantages of tennis. You must act as you breathe.
                                    
“If you attend a study session, only behave like a man wishing to expand his knowledge and seeking a higher reward from God. Do not act like a man content with what he holds, who is waiting for a weakness (from someone) to criticize (it or him), or an oddity to raise. This will be acting like vile people who have never mastered science.’ ‘If you attend with good intentions you will obtain the best results. Otherwise just stay at home, awarding yourself rest, a good morality, and a salutary outcome in front of God.”
ibid, 114
Help us to complete the source, original and additional information
Ibn Hazm 27
Arab theologian 994–1064Related quotes
Source: The Tales of Alvin Maker, Alvin Journeyman (1995), Chapter 2.
Source: Carlos Castaneda (1971) Separate Reality: Conversations With Don Juan. p. 85; As cited in: Eugene Dupuis (2001) Time Shift: Managing Time to Create a Life You Love. Ch. 5: Self Management
                                        
                                        Quoted by Diogenes Laërtius; translation from C. D. Yonge (trans.), The Lives and Opinions of Eminent Philosophers (London: H. G. Bohn, 1853), p. 196. 
Said "when a man preserved a strict silence during the whole of a banquet".