Arriving in the States, I had the feeling of being thrown into an ocean. The ocean was full of knowledge, culture, and opportunities, and the choice was clear: I could either learn to swim or sink. The culture was foreign, the language was difficult, but my hopes were high. I did not speak or write English fluently, and I did not know much about western culture in general, or American culture in particular.

The real problem is that the pain actually gets worse. You have created massive acidosis in your muscles so there is a huge quantity of hydrogen ions and the pH in your blood changes. For 15 minutes you lie there thinking, "God, this is really bad. I'm going to die. It has never been this bad before." And every time you think exactly the same thing. You have to lie to yourself by saying you're not doing a second set. Then, without moving for 15 minutes, almost to the second, I would roll over and think, "OK, I think I can do a second set now." During those sessions I have never felt more alive or so close to death.

Don’t panic. Midway through writing a novel, I have regularly experienced moments of bowel-curdling terror, as I contemplate the drivel on the screen before me and see beyond it, in quick succession, the derisive reviews, the friends’ embarrassment, the failing career, the dwindling income, the repossessed house, the divorce . . . Working doggedly on through crises like these, however, has always got me there in the end. Leaving the desk for a while can help. Talking the problem through can help me recall what I was trying to achieve before I got stuck. Going for a long walk almost always gets me thinking about my manuscript in a slightly new way.

If you get stuck, get away from your desk. Take a walk, take a bath, go to sleep, make a pie, draw, listen to ­music, meditate, exercise; whatever you do, don’t just stick there scowling at the problem. But don’t make telephone calls or go to a party; if you do, other people’s words will pour in where your lost words should be. Open a gap for them, create a space. Be patient.

At this school I was allowed to learn things which interested me: French, History, lots of Poetry by heart, and above all Riding and Swimming. The impression of those years makes a pleasant picture in my mind, in strong contrast to my earlier schoolday memories.

In history I decided to begin with Gibbon. Someone had told me that my father had read Gibbon with delight; that he knew whole pages of it by heart, and that it had greatly affected his style of speech and writing. So without more ado I set out upon the eight volumes of Dean Milman's edition of Gibbon's Decline and Fall of the Roman Empire . I was immediately dominated both by the story and the style. All through the long glistening middle hours of the Indian day, from when we quitted stables till the evening shadows proclaimed the hour of Polo, I devoured Gibbon. I rode triumphantly through it from end to end and enjoyed it all.

Having bought the colours, an easel, and a canvas, the next step was to begin. But what a step to take! The palette gleamed with beads of colour; fair and white rose the canvas; the empty brush hung poised, heavy with destiny, irresolute in the air. My hand seemed arrested by a silent veto.

One by one the more vigorous sports and exacting games fall away. Exceptional exertions are purchased only by a more pronounced and more prolonged fatigue. Muscles may relax, and feet and hands slow down; the nerve of youth and manhood may become less trusty. But painting is a friend who makes no undue demands, excites to no exhausting pursuits, keeps faithful pace even with feeble steps, and holds her canvas as a screen between us and the envious eyes of Time or the surly advance of Decrepitude. Happy are the painters, for they shall not be lonely.

But in a flash there came across me a great project. The chine which the bridge spanned was full of young fir trees. Their slender tops reached to the level of the footway. 'Would it not' I asked myself 'be possible to leap on to one of them and slip down the pole-like stem, breaking off each tier of branches as one descended, until the fall was broken?' I looked at it. I computed it. I meditated. Meanwhile I climbed over the balustrade. My young pursuers stood wonder-struck at either end of the bridge. To plunge or not to plunge, that was the question! In a second I had plunged, throwing out my arms to embrace the summit of the fir tree. The argument was correct; the data were absolutely wrong. It was three days before I regained consciousness and more than three months before I crawled from my bed. The measured fall was 29 feet on to hard ground. But no doubt the branches helped.

The cultivation of a hobby and new forms of interest is therefore a policy of first importance to a public man. But this is not a business that can be undertaken in a day or swiftly improvised by a mere command of the will. The growth of alternative mental interests is a long process. The seeds must be carefully chosen; they must fall on good ground; they must be sedulously tended, if the vivifying fruits are to be at hand when needed. To be really happy and really safe, one ought to have at least two or three hobbies, and they must all be real.