It doesn’t come back (Saint Dimitri of Rostov)

Time past doesn’t return. Life is like a war, like a market, like a school, like a long sea voyage. In battle, there’s no room for respite, in trade you can’t be inactive, at school you can’t be inattentive, on a sea voyage you can’t be negligent. So don’t be lazy, don’t neglect the works of God, but make an effort and work hard. Here’s the battle-field for you, the market-place, the school.