Lloyd-Jones on the Peacemaker Beatitude

I'm now reading two books about the Sermon on the Mount. Martyn Lloyd-Jones' Studies in the Sermon on the Mount, and Jonathan Pennington's The Sermon on the Mount and Human Flourishing. I will no doubt be sharing many quotations from both of these books in this space. Here is Lloyd-Jones on Peacemaker Beatitude (p.100):

Here, then, we are reminded once more that the outworking in the Christian of the Christian life is altogether and entirely different from everything that can be known by any man who is not a Christian. That is the message which recurs in every one of the Beatitudes and which, obviously, our Lord desired to emphasize. He was establishing an etirely new and different kingdom. As we have seen in all our previous studies, there is nothing more fatal than for the natural man to think that he can take the Beatitudesand try to put them into practice. Here once more this particular beatitude reminds us that this is utterly impossible. Only a new man can live this new life.