In the introductory lecture yesterday our attention was drawn to the fact that certain events in the more ancient history of mankind can be rightly understood only when we not merely observe the forces and faculties of the personalities themselves, but when we realise at the outset that through the personalities in question, as through instruments, Beings are working who allow their deeds to stream down from higher worlds into our world.
We must realise that these Beings cannot take direct hold of the physical facts of our existence because, on account of the present stage of their development, they cannot incarnate in a physical body which draws its constituents from the physical world. If, therefore, they desire to work within our physical world, they must make use of the physical human being — of his deeds, but also of his intellect, his powers of understanding.
Source: Rudolf Steiner – GA 126 – Occult History: Lecture 2 – Stuttgart, 28th December 1910
Translated by Dorothy S. Osmond & Charles Davy