The situation of present-day man can be described as follows. His soul is generally speaking really very near to the Spiritual world; but the ideas and especially the feelings produced by a materialistic conception of the world and by a materialistic attitude towards it, have woven a veil before that which is in reality very close to the human soul today. The connection between the physical Earth-existence, in which man with his whole being is involved notwithstanding many assertions to the contrary made in other quarters — the connection between this materialistic earth existence and the Spiritual world can be found by man, if he will endeavour to develop the inner courageous forces necessary for understanding, not only what nature paints to his external senses, but also that which remains invisible. We can unite ourselves with this invisible essence and experience it, if we stir up the inner force of the soul sufficiently to become aware that in this force the soul shares in something super-human and Spiritual.
Source: Rudolf Steiner – GA 175 – Cosmic and Human Metamorphoses – Lecture 2 – The Metamorphoses of the Soul-forces – Berlin, February 13, 1917
Translated by Harry Collison