If you have the right to work with your hands and to gather the harvest for yourself and your children, have you not a right to cultivate your brain?… - Robert Green Ingersoll

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If you have the right to work with your hands and to gather the harvest for yourself and your children, have you not a right to cultivate your brain? Have you not the right to read, to observe, to investigate — and when you have so read and so investigated, have you not the right to reap that field? And what is it to reap that field? It is simply to express what you have ascertained — simply to give your thoughts to your fellow-men.