Your greatest achievement is to love me.

When people are uncertain about what is right and what is wrong, and anxious about being considered old-fashioned, it seems to be worse than folly that Christians are still arguing about doctrinal matters which can only bring needless distress to a number of people.

The sustainability revolution will, hopefully, be the third major social and economic turning point in human history, following the Neolithic Revolution - moving from hunter-gathering to farming - and the Industrial Revolution

Forests ... are in fact the world's air-conditioning system-the very lungs of the planet-and help to store the largest body of freshwater on the planet ... essential to produce food for our planet's growing population. The rainforests of the world also provide the livelihoods of more than a billion of the poorest people on this Earth... In simple terms, the rainforests, which encircle the world, are our very life-support system-and we are on the verge of switching it off.

A large number of us have developed a feeling that architects tend to design houses for the approval of fellow architects and critics, not for the tenants.

Any difficulties which the world faces today will be as nothing compared to the full effects which global warming will have on the world-wide economy.

Humility is to make a right estimate of one's self. It is no humility for a man to think less of himself than he ought, though it might rather puzzle him to do that.