"They Don't Know" by Jon B is a romantic R&B song that talks about the misunderstandings and judgments people may have about a relationship. The lyrics describe how the singer is aware of his past mistakes and questionable actions, which might make others doubt his faithfulness. Despite this, he reassures his partner that she is the only one for him and he wants to love her sincerely. The song tells the story of a relationship where outsiders, referred to as the "jealous ones," try to spread rumors and create doubts about the sincerity of their love. The singer urges his partner to ignore what others say because they don't truly understand the depth of their connection. He believes that their love is unique and should not be affected by baseless jealousy or gossip. The bridge emphasizes the singer's devotion to his partner, calling her his angel and assuring her that nothing will change his feelings for her. He wants her to trust him and not let the opinions of others shake their relationship. Overall, "They Don't Know" is a plea to disregard the negative opinions and focus on the love between two people. The song highlights the importance of trust and loyalty to overcome external judgments and prove the strength of their connection.