Vegetarianism without spiritual striving leads to disease. It’s not a matter of back to nature but of through nature to the spirit. It’s true that meditation and concentration exercises will be the main thing for our spiritual striving, but when the elaboration of the astral body begins, the food that an esoteric eats will be of some importance.
It’s especially important to avoid alcohol in every form. The bad effect of alcohol on the brain function has been scientifically shown, and knowledge of spiritual things is made completely impossible through its use. […] Proteins make mastery of sexual passions difficult. Sugar promotes independence, and should be avoided by egotistical people. People who tend towards envy, deceit and bad will should avoid cucurbits and vine plants in general. The sweet, intoxicating aroma of melons darkens clear, intellectual consciousness and should be avoided by emotional people. Apples intensify the urge to dominate in some people and often lead to rudeness and brutality. The high iron content in cherries and strawberries isn’t good for everyone.
If someone wants to undergo training in thinking, he mainly needs a well-constructed, healthy brain apparatus. Since present-day parents seldom give their children such well-built brains, one needs help to strengthen one’s brain apparatus. And here it’s mainly filberts that supply the brain-building substance. All other nuts are of less value and peanuts should be avoided altogether. Milk butter is the best fat. Coffee supports logical thinking, but doesn’t make one a logical thinker by itself. Drinking too much coffee leads to hysteria in people who don’t think much.
Source: Rudolf Steiner – GA 266 – From the Contents of Esoteric Classes – No date or place given
The great Rudolf Steiner Quotes Site 