We are adapted to infinity. We are hard to please, and love nothing which ends: and in nature is no end; but every thing, at the end of one use, is lifted into a superior, and the ascent of these things climbs into daemonic and celestial natures.
And tell him it's quite true that the best of the philosophers are of no use to their fellows; but that he should blame, not the philosophers, but those who fail to make use of them.
We must begin by acknowledging a hard truth. We will not eradicate violent conflict in our lifetimes. There will be times when nations, acting individually or in concert, will find the use of force not only necessary but morally justified.