The best and greatest winning is a true friend; and the greatest loss is the loss of time. Pythagoras
Through years of secret work, scientific and basic ground work was laid, in order to be ready again to work the German Armed Forces at the appointed hour, without loss of time or experience. Gustav Krupp von Bohlen und Halbach
The greatest loss of time is delay and expectation, which depend upon the future. We let go the present, which we have in our power, and look forward to that which depends upon chance, and so relinquish a certainty for an uncertainty. Seneca
Possessions dwindle: I mourn their loss. But I mourn the loss of time much more, for anyone can save his purse, but none can win back lost time. Latin Proverb
To wash an ass's head is but loss of time and soap. French Proverb