Star Trek: The Original Series, Season 3

Spock:
Change is the essential process of all existence.

Bele:
I once heard that on some of your planets, people believe they are descended from apes.

Spock:
The actual theory is that all lifeforms evolved from the lower levels to the more advanced stages.

[After Bele hears he will not retain Loki without Due Process.]'

Bele:
Yes, he will delay, evade, and escape again. And in the process put thousands of innocent beings at each others throats, getting them to kill and maim, for a cause which they have no stake in. But, which he will force them to violently espouse by twisting their minds with his lies, his loathsome accusations, and his foul threats.