If a man can write a better book, preach a better sermon, or make a better mouse trap than his neighbor, though he build his house in the woods, the world will make a beaten path to his door.GB
It's obviously about making a comparison about 2 persons. The sentence means if one of them (let's say the 2nd one), could write a BETTER book than the 1st, preach a BETTER sermon (than the 1st), or make a BETTER mouse trap (than the 1st), everybody would love to buy from him (=the 2nd person), because he does everything BETTER than the 1st one. So "make a beaten path to his door", means "coming to his door and buying from him", because he has the better stuff.
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If a person is more innovative/creative than others, doesn't metter how far he lives, people will prefer his product than that of the other.GB
Marius HancuUse this site before posting for finding idioms:Great source.
http://www.answers.com/topic/beat-a-path-to-someone-s-door
In this case, you could have used a search at the site on "path."