Some great Bertrand Russell quotes

Bertrand Russell was a wonderful British philosopher who was quite a character.  So many of his views are so pertinent for these times. Here’s a few of his great quotes:
The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.
Collective fear stimulates herd instinct, and tends to produce ferocity toward those who are not regarded as members of the herd.
War does not determine who is right – only who is left.
Those who have never known the deep intimacy and the intense companionship of mutual love have missed the best thing that life has to give.
I say quite deliberately that the Christian religion, as organized in its Churches, has been and still is the principal enemy of moral progress in the world.
It is possible that mankind is on the threshold of a golden age; but, if so, it will be necessary first to slay the dragon that guards the door, and this dragon is religion.
The only thing that will redeem mankind is cooperation.
The good life is one inspired by love and guided by knowledge.
The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd.
Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind.
The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.