It's a battle of wills in the heat of attack, it's the passion that kills.
9 seconds sound clip from the Rocky IV (1985) movie soundboard.
You can hear this line at 00:50:34 in the Blu-ray version of the movie.
Quote context
[...]
- Get in the car now. We have very long trip.
- Sounds like Dracula's cousin.
- In the warrior's code there's no surrender. Though his body says stop, his spirit cries 'Never!'
- Deep in our soul, a quiet ember knows it's you against you. It's the paradox that drives us all.
- It's a battle of wills in the heat of attack, it's the passion that kills.
- In the burning heart just about to burst, there's a quest for answers, an unquenchable thirst. (2)
- In the darkest night rising like a spire. In the burning heart, the unmistakable fire.
[...]