The song "What You Don't Know" by Expose explores the themes of love, trust, and the consequences of hiding the truth. The lyrics suggest that denying or hiding information can sometimes be better for both parties involved, as ignorance prevents any potential pain or hurt. The song implies that uncertainty and mystery can sometimes be preferable to facing uncomfortable truths. In the song, the protagonist emphasizes that love cannot be fully understood or felt until it is proven through actions and commitment. They question whether the other person can feel their love or if they are unable to see it. The line "What you don't know might hurt you, what you don't know" suggests that hiding certain information can spare someone from experiencing emotional pain. It implies that ignorance can be blissful and protect individuals from harsh realities. The lyrics also touch on the idea of karma and the consequences of one's actions. The line "Love is like a game, what goes around, comes around, you wait your turn" indicates that the protagonist believes that those who play with love will eventually face the consequences of their actions. Overall, the song suggests that sometimes it is better to keep things hidden and unknown to prevent hurt. The protagonist emphasizes that as long as one doesn't know the truth, they can avoid potential pain or damage to their emotions.