The most precious thing for a person is life. Everyone has only one life. A person's life should be spent like this: when he recalls the past, he will not regret for wasting his years; nor will he regret for doing nothing. And shamefully, when he was dying, he could say: My whole life and all my energy have been dedicated to the most magnificent cause in the world - the struggle to liberate all mankind. Man should hurry to live life to the fullest, because unexpected illness and tragic accidents can end his life at any time.