A man’s life is like a garden. There is a limit to the things that it will grow. You cannot pack plants in a garden as you pack sardines in a tin. That is why the farmer thins out the turnips, the orchardist prunes his trees, and the husbandman pinches the grapebuds off the trailing vines.
Life has to be treated similarly. By the time a man enters middle life he realizes that his garden is getting overcrowded. It contains all the flowers that he planted in his sentimental youth and all the vegetables that he set there in his prosaic manhood. It is too much.
There must be a thinning out. And, unless he is extremely careful, he will find that the thinning-out process, will automatically consist of the sacrifice of all the pansies and the retentions of all the potatoes.
It carries on in this vein for some time and then draws some conclusions from George Eliot’s The Mill on the Floss and some thoughts about Habakkuk.
The man of forty rests, therefore, under at least three imperative obligations. He must make up his mind that the arrival of middle-age has not closed against him the door of enterprise; he must resolve that, in the mature years of his life, he will cherish some of the more amiable sentiments that inspired his impressionable youth; and he must regard himself as the natural protector of those who are battling fiercely and bravely with the forces through which, not without scars, he has himself passed.Articles "On Being Fifty" and "On Being Sixty" followed, so Dr. Boreham seems to have been speaking with some experience.
In spite of everything, middle-age may then be made sublime.
Dr. F. W. Boreham, "On Being Forty", The Christian World, 13 June 1940, 8. (Line-breaks added)