Satan implied that Jehovah did not want them to eat the fruit because doing so would enlighten them.
قَالَ :‏ « اَللهُ عَالِمٌ أَنَّهُ يَوْمَ تَأْكُلَانِ مِنْهُ [ثَمَرِ ٱلشَّجَرَةِ] تَنْفَتِحُ أَعْيُنُكُمَا » .‏