"Can Religion Cure Our Troubles?", in Stockholm newspaper Dagens Nyheter, part II (11 November 1954) 
1950s
                                    
“Since then I have endeavoured, by precept and by example, to preach the doctrine of Impressionism, particularly in England, where it is so little known and appreciated.”
Source: Impressionist Painting: its genesis and development. (1904), p. vii; Preface.
Help us to complete the source, original and additional information
Wynford Dewhurst 9
British artist 1864–1941Related quotes
“Precepts may instruct, but examples persuade.”
Heaven On Earth, 1654
"Some Thoughts on the Common Toad," Tribune (12 April 1946)
“Example is always more efficacious than precept.”
Source: The History of Rasselas, Prince of Abissinia (1759), Chapter 29
                                        
                                        Political Register (27 October 1832), p. 225 
1830s
                                    
“Brotherhood is an ideal better understood by example than precept!”
Source: Autobiography of a Yogi, Chapter 48 - "At Encinitas In California"
                                        
                                        The Obedience of A Christian Man (1528) 
Context: The preaching of God’s word is hateful and contrary unto them. Why? For it is impossible to preach Christ, except thou preach against antichrist; that is to say, them which with their false doctrine and violence of sword enforce to quench the true doctrine of Christ. And as thou canst heal no disease, except thou begin at the root; even so canst thou preach against no mischief, except thou begin at the bishops.
                                    
“Everywhere he found his precept checkmated by his example.”
Source: Zuleika Dobson http://www.gutenberg.org/dirs/etext99/zdbsn11.txt (1911), Ch. XV
“Præcepta docent, exempla movent, Precepts may instruct, but examples do persuade.”
London's Lamentations