Obra como si la máxima de tu acción pudiera ser erigida, por tu voluntad, en ley universal de la naturaleza - Immanuel Kant

That kings should be philosophers, or philosophers kings is neither to be expected nor to be desired, for the possession of power inevitably corrupts reason's free judgment. However, that kings or sovereign peoples (who rule themselves by laws of equality) should not allow the class of philosophers to disappear or to be silent, but should permit them to speak publicly is indispensable to the enlightenment of their affairs.

...[M]an and generally any rational being exists as an end in himself, not merely as a means to be arbitrarily used by this or that will, but in all his actions, whether they concern himself or other rational beings, must always be regarded at the same time as an end... [R]ational beings... are called persons, because their very nature points them out as ends in themselves, that is, as something which must not be used merely as means, and so far therefore restricts freedom of action (and is an object of respect).

It would be impossible to represent to ourselves darkness, unless light had been given to the senses.