Which sentence best explains the meaning of the bolded line in the exerpt from act v scene I of twelfth night?

"and thus the whirlgig of time brings his revenges"

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The line, "and thus the whirlgig of time brings his revenges" means you reap what you sow. Whirlgig is originally a top or any rotary device-becomes in this phrase a metaphor for time, which whirls back at a person what he has done during his life.