Neither a borrower nor a lender be

Neither a borrower nor a lender be.

Prov. It is difficult to be friends with someone who owes you money or with someone to whom you owe something, so it is better not to borrow or lend in the first place. After losing several of my favorite books because I didn't have the nerve to insist that my friends return them, I learned that it is best to neither a borrower nor a lender be.
See also: neither, nor