You've got to involve yourself in doing something for other people all the time. I know that sounds sentimental, but you see, ordinary people are the most generous people on Earth without question. And what I think we should do is constantly try to give as much of ourselves as we can to each other - that's the secret of happiness for all of us.

It's the sheer joy of seeing things grow and helping them to grow, even harvesting the stuff that you've grown yourself, no matter how old you are.

I have an optimism about what people are willing to do. The greatest force in the world today, believe it or not, are these countless groups of people in every country almost... that are doing things to protect their local environment and to try and protect the earth.

You've got to involve yourself in doing something for other people all the time. I know that sounds sentimental, but you see, ordinary people are the most generous people on Earth without question. And what I think we should do is constantly try to give as much of ourselves as we can to each other - that's the secret of happiness for all of us.

Old gardeners never die; they just very slowly turn into the most magnificent compost. But what a marvellous, active brew it is!

It is a good life, if you're doing what you like doing.

My best advice to individual investors can readily be summed up into two closely linked precepts. Be patient and don't be greedy.