Remember the time which is past and the years of your life which were lost in the vanity of this world. Can you return of them even a single day or night? And likewise, if the end of your life comes, can you add or beg back a day for repentance, or even a single hour? We shall wish to seek out the time we have poorly spent of our life, and we shall not find it.
St. Paisius Velichkovski