"It is to be observed that 'angling' is the name given to fishing by people who can't fish"

This quote by Stephen Leacock is an amusing way of explaining the difference between those who can fish and those who can not. He is recommending that those who can not fish refer to it as 'angling' as a way of making it sound more advanced. This indicates that those who can fish are more experienced and well-informed about the activity, while those who can not fish are less knowledgeable and might not understand the subtleties of the sport. This quote is an easy going way of poking fun at those who are not as experienced in fishing, while likewise highlighting the importance of having the needed abilities and understanding to be effective. It is a tip that fishing is not simply a leisurely activity, however a skill that needs practice and dedication to master.