Today, 15th March, 1968, now it is 7:35, gone, as soon as it is 7:36, you cannot bring back that 1968, 15th March, evening, 7:35, again. Even if you pay millions of dollars, “Please come back again,” no, finished. So Canakya Pandita says that “Time is so valuable that if you pay millions of golden coins, you cannot get back even a moment.” What is lost is lost for good. “If you such valuable time spoil for nothing, without any profit, just imagine how much you are losing, how greatly you are loser.”

From Srila Prabhupada’s lecture on Srimad-Bhagavatam 7.6.1 — San Francisco, March 15, 1968