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If it is true, as I have tried to show, that love is the only sane and satisfactory answer to the problem of human existence, then any society which excludes, relatively, the development of love, must in the long run perish of its own contradiction with the basic necessities of human nature.
A normal human being does not want the Kingdom of Heaven: he wants life on earth to continue. This is not solely because he is "weak," "sinful" and anxious for a "good time." Most people get a fair amount of fun out of their lives, but on balance life is suffering, and only the very young or the very foolish imagine otherwise. Ultimately it is the Christian attitude which is self-interested and hedonistic, since the aim is always to get away from the painful struggle of earthly life and find eternal peace in some kind of Heaven or Nirvana. The humanist attitude is that the struggle must continue and that death is the price of life.
wars are often the cause of further wars because they fuel deep hatreds, create situations of injustice and trample upon people's dignity and rights. Wars generally do not resolve the problems for which they are fought and therefore, in addition to causing horrendous damage, they prove ultimately futile. War is a defeat for humanity. Only in peace and through peace can respect for human dignity and its inalienable rights be guaranteed.
We do not ask for what useful purpose the birds do sing, for song is their pleasure since they were created for singing. Similarly, we ought not to ask why the human mind troubles to fathom the secrets of the heavens. The diversity of the phenomena of nature is so great and the treasures hidden in the heavens so rich precisely in order that the human mind shall never be lacking in fresh nourishment.