That sentence reads like a political and moral aphorism:
“When David surrenders, Goliath begins boots on people’s faces forever.”
In the biblical story, David represents the weaker individual confronting overwhelming power, while Goliath represents dominant force. Your statement reverses the original story’s ending and suggests:
Resistance places limits on power.
Surrender removes those limits.
Unchecked power tends toward permanent oppression.
It also echoes a recurring theme in political philosophy: freedom often survives because people are willing to challenge concentrations of power, even when they appear invincible.
A deeper interpretation might be:
The existence of resistance matters as much as its success. The moment all opposition disappears, power ceases to justify itself and can become tyranny.
Of course, there is another side. Constant conflict can also become destructive. A healthy society ideally creates institutions, laws, and norms that allow disagreements to be resolved without requiring every generation to fight its own Goliaths.
As a concise manifesto-style statement, your line is powerful because it compresses a larger principle into a memorable image:
“Where courage ends, domination begins.”