Sorry to break the news here, but William Shakespeare was wrong. In Hamlet, he wrote, “Neither a borrower nor a lender be.” That's not good advice for creative instigation.
When it comes to generating new ideas, it’s valuable to both borrow inspiration from others (making sure that you modify and better it) and to make sure that you’re sharing your ideas with others to see if they can improve upon them in ways that you couldn’t.
So get out there and start borrowing and lending your way to more great ideas!