Rudolf Steiner: "Every word spoken without having been thoroughly purged in thought is a stone thrown in the way of esoteric training. And here something must be considered which can only be explained by giving an example. If anything be said to which we must reply, we must be careful to consider the speaker's opinion, feeling, and even his prejudice, rather than what we ourselves have to say at the moment on the subject under discussion. In this example a refined quality of tact is indicated, to the cultivation of which the student must devote his care. He must learn to judge what importance it may have for the other person if he opposes the latter's opinion with his own. This does not mean that he must withhold his opinion. There can be no question of that. But he must listen to the speaker as carefully and as attentively as he possibly can and let his reply derive its form from what he has just heard. In such cases one particular thought recurs ever and again to the student, and he is treading the right path if this thought lives with him to the extent of becoming a trait of his character. This thought is as follows: The importance lies not in the difference of our opinions but in his discovering through his own effort what is right if I contribute something toward it. Thoughts of this and of a similar nature cause the character and the behavior of the student to be permeated with a quality of gentleness, which is one of the chief means used in all esoteric training. Harshness scares away the soul-pictures that should open the eye of the soul; gentleness clears the obstacles away and unseals the inner organs."