There is a desire in every person, be he happy or unhappy. That desire is to live; even if not on the earth, in the hereafter. And the one who looks at it with pessimism and says, "I do not know if there is a hereafter," he also would like to be convinced that there is a hereafter. If that person disputes with you against the possibility of the hereafter, it is only to establish in his mind a conviction that there is a hereafter. He will not admit it, for he thinks it is intelligence to deny it. But he is not willing to die: he is not willing to deny that there is a continual life.