Time is money.

Time is a resource with economic value and should be spent accordingly.

What They Mean

Account for the hours. Every activity carries an invisible invoice, and dawdling is a form of spending.

For those who bill by the hour, literally. For everyone else, the metaphor holds until it is used to justify answering email during dinner.

Money is not time. It cannot buy a second of it back at any exchange rate.

6.0 out of 10

Useful bookkeeping, dangerous philosophy, and the founding document of the meeting that could have been an email.