For science can only ascertain what is, but not what should be, and outside of its domain value judgments of all kinds remain necessary. Religion, on the other hand, deals only with evaluations of human thought and action: it cannot justifiably speak of facts and relationships between facts.
With five feeble senses we pretend to comprehend the boundlessly complex cosmos, yet other beings with wider, stronger, or different range of senses might not only see very differently the things we see, but might see and study whole worlds of matter, energy, and life which lie close at hand yet can never be detected with the senses we have.
It thrilled through him when he first felt the keel answer to his hand on the spokes and slide over the long hollows as the foresail scythed back and forth against the blue sky.
In the kingdom of ends everything has either a price or a dignity. Whatever has a price can be replaced by something else as its equivalent; on the other hand, whatever is above all price, and therefore admits of no equivalent, has a dignity. But that which constitutes the condition under which alone something can be an end in itself does not have mere relative worth, i.e., price, but an intrinsic worth, i.e., a dignity.
We become lovers when we see Romeo and Juliet, and Hamlet makes us students. The blood of Duncan is upon our hands, with Timon werage against the world, and when Lear wanders out upon the heath the terror of madness touches us. Ours is the white sinlessness of Desdemona, and ours, also, the sin of Iago.