The vegetarian movement ought to fill with gladness the souls of those who have at heart the realization of God's kingdom upon earth, not because vegetarianism itself is such an important step towards the realization of this kingdom (all real steps are equally important or unimportant), but because it serves as a criterion by which we know that the pursuit of moral perfection on the part of man is genuine and sincere.
Leo TolstoyWhere did I get it from? Was it by reason that I attained to the knowledge that I must love my neighbour and not throttle him? They told me so when I was a child, and I gladly believed it, because they told me what was already in my soul. But who discovered it? Not reason! Reason has discovered the struggle for existence and the law that I must throttle all those who hinder the satisfaction of my desires. That is the deduction reason makes. But the law of loving others could not be discovered by reason, because it is unreasonable.
Leo Tolstoy