[I]"Whoever strives for esoteric development must above all be clear that
certain extremely simple formulae conceal a force which takes effect if
these formulae or sentences are made alive in the soul. He does not
rightly grasp what this implies if he tries to understand such sentences
merely with the intellect. That way they say very little to him, to begin
with. He must for a certain time fill his whole inner being with such a
sentence, pouring himself into it with all the powers of his soul. Such a
sentence is: `I am’.
The whole secret of present-day human existence really lies in this
sentence."[/I]
From
Guidance in esoteric training
by Rudolf Steiner