The song "Black Heart" by U.D.O. explores themes of darkness, evil, and the corrupting power they hold. The lyrics describe black as a color that represents coldness, power, and perpetual wrongness. The burning inside refers to the internal struggles and negative emotions that individuals experience. The phrase "blinded minds - all the time - it happens all again" suggests that people are often unaware of the destructive patterns they repeat. The song emphasizes the need for friendship and unity to save the broken world that is depicted. The lyrics express the idea that freedom needs to be defended by rejecting the influence of evil forces, symbolized as the devil. The phrase "don't need a devil inside" implies that people should resist evil and its tempting ways. The chorus emphasizes the impact of darkness and evil, comparing them to a black heart and a dark mind. It suggests that if left unchecked, evil will grow and lead to harmful actions and crimes. The line "Hail the devil and bless the crime" implies a sarcastic tone, criticizing those who support and glorify evil deeds. The lyrics also touch upon the repetition of destructive stories throughout generations and the manipulation of innocent individuals. The wrong directions mentioned in the song refer to the misleading paths people are led down, often driven by fear and ignorance. The phrase "revenge is always near" implies that negative actions and consequences are never far away. Overall, "Black Heart" delves into the themes of darkness, evil, and the importance of standing against them. It suggests that unity, friendship, and the rejection of evil are necessary to create a better world.