The passing time does not go back. Our lives are like a war, like a market, like a school, like a long sea voyage.
There is no rest in battles, no apathy in commerce, no negligence in school, no freedom from care in the sea voyage.
Thus do not be lazy, do not neglect the works of God, but exercise and labor; this is the battlefield, the marketplace, the school for you.
Saint Dimitri of Rostov