Man is too quick at forming conclusions.

It is well to fetter the wings of our fancy and restrain its flights.

I have been watching and drawing the surface of Mars. It is wonderfully full of detail. There is certainly no question about there being mountains and large greatly elevated plateaus.

It is quite possible we may have formed entirely erroneous ideas of what we actually see. The greenish gray patches may not be seas at all, nor the ruddy continents, solid land. Neither may the obscuring patches be clouds of vapor.

The beef industry has contributed to more American deaths than all the wars of this century, all natural disasters, and all automobile accidents combined.

Chicken fat, beef fat, fish fat, fried foods - these are the foods that fuel our fat genes by giving them raw materials for building body fat.

To give a child animal products is a form of child abuse.

If beef is your idea of 'real food for real people,' you'd better live real close to a real good hospital.

A vegan diet takes care of most of what we need to do. But you'll also want to minimize the use of oils generally, because while olive oil and other vegetable oils are better for your heart than chicken fat, they are as fattening as animal fats.

I have been following a vegan diet now since the 1980s, and find it not only healthier, but also much more attractive than the chunks of meat that were on my plate as a child.

In my own life, I decided to leave meat off my plate in medical school, but was a bit slow to realise that dairy products and eggs are not health foods either.

Meat consumption is just as dangerous to public health as tobacco use... It's time we looked into holding the meat producers and fast-food outlets legally accountable.

We help people to begin truly healthful diets, and it is absolutely wonderful to see, not only their success, but also their delight at their ability to break old habits and feel really healthy for a change.