If your hair becomes grey, that is the first warrant from the Lord of Death. You must get ready to meet him. The wrinkles on the face and the bending of the body will also remind you of the warrant.
From "Daily Sayings" by Swami Sivananda (1987-1963). More Informations on Swami Sivananda: on the Website of Divine Life Society, Photographs of Swami Sivananda, German Pages on Swami Sivananda