Spiritual science attempts to speak about non-sensory things in the same way that the natural sciences speak about sense-perceptible things...No one can ever deny others the right to ignore the supersensible, but there is never any legitimate reason for people to declare themselves authorities, not only on what they themselves are capable of knowing, but also on what they suppose cannot be known by any other human being.

For every step in spiritual perception, three steps are to be taken in moral development.

To truly know the world, look deeply within your own being; to truly know yourself, take real interest in the world.

The outer world, with all its phenomena, is filled with divine splendour, but we must have experienced the divine within ourselves, before we can discover it in our environment

Intuition is for thinking what observation is for perception. Intuition and observation are the sources of our knowledge.

For every human illness, somewhere in the world there exists a plant which is the cure. I believe that there is a healing potential locked inside plants which is integral with their evolution, just as it is part of human evolution to learn to tap this wonderful gift of Nature.

Man is effective in the world not only through what he does, but above all through what he is.