“The truth is rarely pure and never simple.”
Wilde resists neat moral simplification by reminding the reader that truth often arrives mixed with context and contradiction.
Source details
The Importance of Being Earnest, Act I; Algernon Moncrieff. Exact catalog wording is preserved in the scan-backed Samuel French acting text on Wikisource, scan leaf 14 / printed page 12. The acting-text witness is abridged elsewhere, so this record is bound only to its independently verified page.