“Justice has always been a human ideal, but it is not fully compatible with mercy. Creative imagination and spontaneity, splendid in themselves, cannot be fully reconciled with the need for planning, organization, careful and responsible calculation. Knowledge, the pursuit of truth—the noblest of aims—cannot be fully reconciled with the happiness or the freedom that men desire, for even if I know that I have some incurable disease this will not make me happier or freer. I must always choose: between peace and excitement, or knowledge and blissful ignorance. And so on.
So what is to be done to restrain the champions, sometimes very fanatical, of one or other of these values, each of whom tends to trample upon the rest, as the great tyrants of the twentieth century have trampled on the life, liberty, and human rights of millions because their eyes were fixed upon some ultimate golden future?
I am afraid I have no dramatic answer to offer: only that if these ultimate human values by which we live are to be pursued, then compromises, trade-offs, arrangements have to be made if the worst is not to happen. So much liberty for so much equality, so much individual self-expression for so much security, so much justice for so much compassion. My point is that some values clash: the ends pursued by human beings are all generated by our common nature, but their pursuit has to be to some degree controlled—liberty and the pursuit of happiness, I repeat, may not be fully compatible with each other, nor are liberty, equality, and fraternity.
So we must weigh and measure, bargain, compromise, and prevent the crushing of one form of life by its rivals. I know only too well that this is not a flag under which idealistic and enthusiastic young men and women may wish to march—it seems too tame, too reasonable, too bourgeois, it does not engage the generous emotions. But you must believe me, one cannot have everything one wants—not only in practice, but even in theory. The denial of this, the search for a single, overarching ideal because it is the one and only true one for humanity, invariably leads to coercion. And then to destruction, blood—eggs are broken, but the omelette is not in sight, there is only an infinite number of eggs, human lives, ready for the breaking. And in the end the passionate idealists forget the omelette, and just go on breaking eggs,” – Isaiah Berlin, “A Message to the 21st Century.”