I want to make sure I’m understanding you correctly, because that line sounds like a quote or proverb, but it’s a bit unclear.
Do you mean something like:
- At 70 or 80 years old, sleeping 8 hours leads to a very quiet/low-energy day?
or - Older people no longer need 8 hours of sleep?
or - A poetic saying about age, sleep, and silence?
Give me one sentence of context (health, sleep, aging, or literature), and I’ll explain it properly — no guessing, no fluff.