Sound always has a power; it has much more power than men think. It may be a good power and it may be a bad power. It creates vibrations which have an undeniable effect. It is not so much the idea as the sound; the idea too has its own power, but in its own domain—whereas the sound has a power in the material world.
I think I have explained this to you once; I told you, for example, that words spoken casually, usually without any reflection and without attaching any importance to them, can be used to do something very good. I think I spoke to you about “Bonjour”, “Good Day”, didn’t I? When people meet and say “Bonjour”, they do so mechanically and without thinking. But if you put a will into it, an aspiration to indeed wish someone a good day, well, there is a way of saying “Good Day” which is very effective, much more effective than if simply meeting someone you thought: “Ah! I hope he has a good day”, without saying anything. If with this hope in your thought you say to him in a certain way, “Good Day”, you make it more concrete and more effective. It’s the same thing, by the way, with curses, or when one gets angry and says bad things to people.
This can do them as much harm—more harm sometimes—than if you were to give them a slap. With very sensitive people it can put their stomach out of order or give them palpitation, because you put into it an evil force which has a power of destruction. It is not at all ineffective to speak. Naturally it depends a great deal on each one’s inner power. People who have no strength and no consciousness can’t do very much—unless they employ material means. But to the extent that you are strong, especially when you have a powerful vital, you must have a great control on what you say, otherwise you can do much harm. Without wanting to, without knowing it; through ignorance.