If something gives pleasure and is useful, it is false—that is, an illusion. If it gives pain and is not useful, it is true—that is, reality.

 If something gives pleasure and is useful, it is false—that is, an illusion. If it gives pain and is not useful, it is true—that is, reality. The first represents being deceived by a nonexistent utopia, while the latter reflects honestly the nature of existence as it is.