“All the interests of my reason, speculative as well as practical, combine in the three following questions: 1. What can I know? 2. What ought I to do? 3. What may I hope?”
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Morality is not the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness.
Even philosophers will praise war as ennobling mankind, forgetting the Greek who said: 'War is bad in that it begets more evil than it kills.'
I had therefore to remove knowledge, in order to make room for belief.
He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.