Said the Beggar: "I marvel not that thou hast taken a liking to my manner of life, good fellow, but 'to like' and 'to do' are two matters of different sorts. I tell thee, friend, one must serve a long apprenticeship ere one can learn to be even so much as a clapper-dudgeon, much less a crank or an Abraham-man. You are probably too old to get the hang of it."
Source: wiktionary