From Wiktionary, the free dictionary
خود را گول زدن • (xod râ gul zadan)
- to deceive oneself
- خودمان را گول نزنیم.
- Xódemân râ gul názanim. (more literary)
- Let us not fool ourselves.
- خودت رو گول نزن.
- Xódet o gul názan. (more colloquial)
- Don't fool yourself.