"Good fences make good neighbors." This quotation is by -

Robert Frost: 
- In full,  Robert Lee Frost, American poet.
- He was much admired for his depictions of the rural life of New England.
- His command of American colloquial speech, and his realistic verse portraying ordinary people in everyday situations.

• Legendary/Best Poems:
- Road not Taken
- Mending Wall
- Stopping by Woods on a Snowy Evening
- Christmas Trees
- A Boy’s Will
- North of Boston
- Nothing Gold Can Stay
- After Apple-picking
- Home Burial.

• Famous quotations by Robert Frost:
- The woods are lovely, dark and deep. (Stopping by woods on a snowy evening)
- But I have promises to keep, and miles to go before I sleep. (Stopping by woods on a snowy evening)
- Good fences make good neighbors. (Mending Wall)

Source: Britannica & Oxford Dictionary of Quotation