Amateurs often excuse their shortcomings on the ground that they are not professionals, the professional could plead with greater justice that he is not an amateur.
 Samuel Butler, The Note-Books of Samuel Butler (1912). copy citation

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Author Samuel Butler
Source The Note-Books of Samuel Butler
Topic justice excuse
Date 1912
Language English
Reference
Note
Weblink http://www.gutenberg.org/files/6173/6173-h/6173-h.htm

Context

“A great colourist is no better than a great wordist unless the colour is well applied to a subject which at any rate is not repellent. Amateurs and Professionals There is no excuse for amateur work being bad. Amateurs often excuse their shortcomings on the ground that they are not professionals, the professional could plead with greater justice that he is not an amateur. The professional has not, he might well say, the leisure and freedom from money anxieties which will let him devote himself to his art in singleness of heart, telling of things as he sees them without fear of what man shall say unto him;” source