Even a moment of ones lifetime could not be returned in exchange for millions of dollars. Therefore one should consider how much loss one suffers if he wastes even a moment of his life for nothing. Living like an animal, not understanding the goal of life, one foolishly thinks that there is no eternity and that his life span of fifty, sixty, or, at the most, one hundred years, is everything. This is the greatest foolishness. Time is eternal, and in the material world one passes through different phases of his eternal life. Time is compared herein to a sharp razor. A razor is meant to shave the hair from ones face, but if not carefully handled, the razor will cause disaster. One is advised not to create a disaster by misusing his lifetime. One should be extremely careful to utilize the span of his life for spiritual realization, or Krsna consciousness.