Rudolf Steiner: "The human soul is like a stove that does not need to be persuaded to heat a room, because heating is its function. The stove does this on its own, provided we put wood into it and light it. It could be objected that the appearance of the wood does not suggest to us that it can generate heat, and yet it does precisely that. By putting some firewood, the appearance of which is so different from the stove, into it and lighting it, we bring warmth into our house. Similarly, by getting used to spiritual scientific concepts, we also become accustomed to our ability to make judgments and to orient ourselves freely in this world. It is not our task to preach ideals but rather to provide human souls with the fuel that can generate spiritual wisdom, genuine brotherliness, and true humanity."